Fetal Alcohol Syndrome Essay Questions

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Effects of Prenatal Alcohol Exposure on Child Development

Joseph L. Jacobson, Ph.D., and Sandra W. Jacobson, Ph.D.

Joseph L. Jacobson, Ph.D., is a professor in the Department of Psychology, College of Science, and Sandra W. Jacobson, Ph.D., is a professor in the Department of Psychiatry and Behavioral Neurosciences, School of Medicine, both at Wayne State University, Detroit, Michigan.

Maternal alcohol use during pregnancy contributes to a range of effects in exposed children, including hyperactivity and attention problems, learning and memory deficits, and problems with social and emotional development.

Fetal Alcohol Syndrome

The most serious consequence of maternal drinking during pregnancy is fetal alcohol syndrome (FAS). FAS was first described in the United States by Jones and Smith (1973), who identified a distinctive set of facial anomalies—short eyelid openings (palpebral fissures), flat midface, thin upper lip, and a flat or smooth groove between nose and upper lip (philtrum)—in children whose mothers drank very heavily during pregnancy. These children also exhibit growth retardation as well as significant cognitive and/or behavioral problems.

In contrast with Down syndrome patients, who exhibit impairment in virtually all aspects of intellectual function, FAS patients often perform relatively well on language tests (e.g., Kodituwakku et al. 1995), although they tend to have difficulty with complex language tests, especially those tapping the pragmatic aspect of language. The most consistent deficits are in arithmetic (Streissguth et al. 1991; Clarren et al. 1994) and attentional function (Kodituwakku et al. 1995). Although many FAS patients are mentally retarded (i.e., have an IQ less than 70), a substantial proportion perform in the low average to average range on IQ tests (Streissguth et al. 1991).

It is particularly instructive to consider studies comparing children with FAS with children not exposed to alcohol who have similar low IQ scores. In one such study, FAS children had reading scores similar to those of IQ–matched control subjects, but they performed significantly less well on arithmetic and certain aspects of attention (e.g., executive function, which is the ability to coordinate, plan, and execute appropriate responses and to modify behavior flexibly in response to feedback) (Carmichael Olson et al. 1998). Children with FAS have poorer socioemotional development (i.e., emotional, personality, social, and moral development) than would be expected based on their IQ scores (Thomas et al. 1998; Carmichael Olson et al. 1998).

Fetal Alcohol Effects and Alcohol–Related Neurodevelopmental Disorder

The term “fetal alcohol effects” (FAE) is applied to children whose mothers are known to have drunk heavily during pregnancy and who exhibit some, but not all, of the characteristics of FAS (Streissguth et al. 1991; Coles et al. 1997). The IQ scores of FAE patients are also depressed but tend to be somewhat higher than those found in FAS children.

In an attempt to increase precision in diagnosis, an Institute of Medicine panel has recommended distinguishing among three forms of FAE (Stratton et al. 1996). The term “partial FAS” applies to children with confirmed heavy prenatal alcohol exposure, some components of the characteristic alcohol–related facial dysmorphology, and physical growth or neurodevelopmental abnormalities. “Alcohol–related birth defects” (ARBD) is applied to those with confirmed heavy prenatal alcohol exposure and one or more congenital abnormalities, usually cardiac, skeletal, renal, ocular, or auditory.

“Alcohol–related neurodevelopmental disorder” (ARND) is applied to children with confirmed heavy prenatal alcohol exposure who exhibit measurable, albeit generally subtler neurobehavioral deficits than are seen with FAS. Although reduced IQ scores are not usually found (Goldschmidt et al. 1996; Jacobson et al. 1998a; but see Streissguth et al. 1990), ARND children exhibit developmental deficits in the domains that are most severely affected by FAS. That is, the most consistent deficits are in arithmetic (Goldschmidt et al. 1996; Streissguth et al. 1993), attention (Streissguth et al. 1994; Jacobson et al. 1998a), and socioemotional function (Carmichael Olson et al. 1998; Jacobson et al. 1998b). In comparison with FAS, ARND affects a much larger number of children, but the effects, although clinically important, are less severe. Most recently, the term “fetal alcohol spectrum disorders” (FASD) has emerged to refer collectively to FAS, partial FAS, ARBD, and ARND. The following sections examine in more detail the cognitive and behavioral effects of prenatal exposure to alcohol.

Hyperactivity and Attention

Data on the relationship between FAS and hyperactivity are inconsistent. Although hyperactivity has been reported in several studies of clinic patients (Steinhausen et al. 1982; Nanson and Hiscock 1990), it was rated as least severe among the problems reported by parents of FAS children in a recent study (Roebuck et al. 1999). Coles and colleagues (1997) found little evidence of hyperactivity or impulsivity in a sample of FAS/FAE children recruited when their mothers sought prenatal care. These authors suggest that studies drawing participants from medical and psychiatric referrals, in contrast with longitudinal samples such as their own, may be more likely to include patients living in unstable family situations. As a result, the hyperactivity reported in studies of clinic–referred patients may have been caused by social and environmental factors, such as co–occurring attachment disorders, anxiety, and post–traumatic stress disorder. Clinic–referred samples may also be affected by selection bias. For example, FAS children who are also hyperactive are more likely to be referred for treatment because their behavior is disruptive in family and school settings.

Sustained Attention. Sustained attention, which refers to the ability to remain alert and focused over time, is usually assessed by timed vigilance or continuous performance tests. In these tests, a series of letters is displayed on a computer screen and the child presses a button whenever a predesignated target stimulus appears. Although Nanson and Hiscock (1990) found slower reaction time among FAS/FAE children on a vigilance task, the children’s error rates were not elevated, and other studies have not found deficits on vigilance tasks (Carmichael Olson et al. 1992; Coles et al. 1997). Sustained attention deficits become evident among FAS/FAE patients only on tasks that also require active processing of information. For example, Carmichael Olson and colleagues (1998) found poorer performance with increased prenatal alcohol exposure on a serial reaction time task, which requires remembering motor patterns of keystrokes on a computer, and on a timed reading comprehension test. As another example, Nanson and Hiscock (1990) found more errors among alcohol–exposed children than control subjects on a delayed reaction time test. These results demonstrate deficits primarily on sustained attention tasks that also require active recall of information or response inhibition, suggesting impairment in executive function rather than sustained attention per se.

Focused Attention. At least three studies of FAS/FAE patients have reported deficits in focused attention, which is the ability to maintain attention in the presence of distraction (Carmichael Olson et al. 1992; Kerns et al. 1997; Coles et al. 1997). Poorer focused attention with increased prenatal alcohol exposure has also been found in children exposed primarily at the lower levels associated with ARND (Streissguth et al. 1994; Jacobson et al. 1998a). Coles and colleagues (1997) noted, however, that, although focused attention was significantly poorer among the FAS/FAE children than the control subjects in the study, the FAS/FAE children actually performed somewhat better than children with attention deficit hyperactivity disorder (ADHD). Thus, the focused attention deficit associated with prenatal alcohol exposure appears to be less severe than in ADHD.

Cognitive Flexibility. Cognitive flexibility refers to the ability to attend to multiple criteria simultaneously and to shift attention during a task. FAS has been linked to poor cognitive flexibility on tests of verbal fluency in which the child is asked to list as many words as possible from a given category (Kodituwakku et al. 1995; Jacobson et al. 1998a). These tests assess the ability to monitor information retrieved from long–term memory for conformity with a prescribed rule (e.g., the given category). Reduced cognitive flexibility has also been found among FAS children on a design fluency test (Schonfeld et al. 2001), a visuospatial version of verbal fluency; the California Trail Making Test (Mattson et al. 1999), in which the child must alternate between successive numbers and letters while “connecting the dots”; and the Wisconsin Card Sorting Test (Kodituwakku et al. 1995; Coles et al. 1997). In the Wisconsin Card Sorting Test, the child must sort cards based on one of three underlying principles: color, shape, or number of items on a card. After the child utilizes the correct criterion for 10 successive trials, the criterion is changed. Inability to modify one’s responses when the criterion changes and perseveration on the wrong category indicate lack of flexibility. Thus, the test assesses both the ability to use feedback to alter one’s response and the ability to inhibit a previously learned but now inappropriate response (i.e., response inhibition). Poor response inhibition has also been found in FAS/FAE children on the California Stroop Test (Mattson et al. 1999), which measures speed in reading color names printed in a different color (e.g., the word “blue” printed in the color red) and on a modified design fluency task (Schonfeld et al. 2001).

Planning. With regard to planning, FAS children show poor performance on tests such as the Stepping Stone Maze, Raven’s Standard Progressive Matrices, and two variants of the Tower of Hanoi: the Progressive Planning Test (Kodituwakku et al. 1995) and the Tower of California (Mattson et al. 1999). The Stepping Stone Maze assesses a child’s ability to use feedback to find an invisible path through a maze (Carmichael Olson et al. 1992); Raven’s Standard Progressive Matrices requires the child to determine which of six complex patterns is the most appropriate to insert in a blank space cut from a larger design; and the Tower of Hanoi involves moving beads on three colored pegs to match the pattern shown in a photograph. All three tasks assess complex planning, including the ability to analyze a problem, devise a strategy, monitor one’s performance, and modify one’s strategy as performance proceeds. Poorer executive function has also been found in studies that tested children exposed to alcohol primarily at levels associated with ARND. These studies used the Stepping Stone Maze (Streissguth et al. 1994) and a variant of the Tower of Hanoi (Jacobson et al. 1998a). Coles and colleagues (1997) noted that, in contrast with focused attention, executive function deficits were more severe in FAS/FAE children than in children with ADHD.

Learning and Memory

Recent studies have found that FAS/FAE patients show greater impairment of certain aspects of learning and memory than others. Kerns and colleagues (1997) reported that, although nonretarded adults with FAS found it difficult to memorize word lists on the California Verbal Learning Test (CVLT), they had little apparent difficulty in retaining what they learned. Similarly, Mattson and colleagues (1996, 1998) found that FAS/FAE children tested on the CVLT have more difficulty in memorizing new information than in retaining and retrieving what they have previously learned.

In a study comparing FAS/FAE children with Down syndrome children, Mattson and Riley (1999) administered a priming task, in which the child initially reads a list of words and is then shown a list in which only the first two letters of the word are displayed. Some of the words on the second list come from the first list; others do not. Although both the alcohol–exposed and Down syndrome children performed more poorly than control subjects when asked to recall a list of words they had seen without any prompting or priming, the alcohol–exposed children performed as well as the control children in recognizing those words when presented in a multiple–choice format and when given the clues provided in the priming task. Thus, the learning and memory impairment associated with prenatal alcohol exposure is apparently more circumscribed than that associated with Down syndrome. Retention and recognition memory are relatively intact, as is the capacity to benefit from priming.

In another study, FAS/FAE children with normal range IQ scores were given 8 trials to learn to press 5 computer keys in a particular 10–item sequence (Carmichael Olson et al. 1998). The alcohol–exposed children were as capable of learning to perform the sequence manually (demonstrating procedural memory) as the controls but, when asked to verbally recall the sequence (demonstrating declarative memory), they were not able to do so. Thus, their procedural memory was apparently not affected.

Memory deficits have also been reported in children exposed at levels associated with ARND. Among 7–year–olds, greater prenatal alcohol exposure was associated with poorer memory for designs (Streissguth et al. 1989), poorer recall of number sequences (Streissguth et al. 1989; Jacobson et al. 1998a), and poorer recall of rhythmical patterns on the Seashore Rhythm Test (Streissguth et al. 1989).

In the only study to examine memory processing during infancy, Jacobson and colleagues (1993) found that, as in the studies of FAS/FAE children, recognition memory appeared to be unaffected by prenatal alcohol exposure. However, greater prenatal alcohol exposure was associated with slower, less efficient information processing at 6.5 and 12 months of age on two tasks involving the encoding of information into short–term memory (Jacobson et al. 1993). Greater prenatal alcohol exposure was also associated with the poorer performance on Visual Expectancy Paradigm (Haith et al. 1988), which assesses the degree to which the infant visually anticipates the next appearance of a stimulus during a regular left–right alternating display (Jacobson et al. 1994).

Socioemotional Function

Prenatal alcohol exposure is associated with increased levels of irritability during infancy (Coles et al. 1991), a temperamental variable known to contribute to poorer maternal attachment and behavioral problems in childhood (Kelly et al. 2000). Two studies have found that children exposed prenatally to alcohol were rated by their teachers as less socially competent and more aggressive in the classroom (Brown et al. 1991; Jacobson et al. 1998b). Because these effects remained significant after controlling for current maternal drinking and measures of quality of parenting, these studies suggest that prenatal alcohol exposure may have effects on socioemotional development that are independent of the social environment in which the child is raised.

Carmichael Olson and colleagues (1992) administered the Vineland Adaptive Behavior Scale, a measure of social skills and emotional maturity, to the parents of FAS/FAE adolescents. The adolescents’ most substantial deficits, based on the parents’ responses, were in the socialization domain, which assesses interpersonal skills and the ability to conform to social conventions. The most salient problems were failure to consider the consequences of one’s actions, lack of responsiveness to social cues, and poor interpersonal relationships (Streissguth et al. 1991). Whereas the Vineland scores in two other domains—communication and daily living skills—were roughly commensurate with the children’s IQ scores, their interpersonal skills averaged 20 points lower than expected based on IQ (Carmichael Olson et al. 1992).

Thomas and colleagues (1998) compared 15 FAS/FAE children with 15 normal control subjects and 15 control children matched for verbal IQ. The Vineland scores of the alcohol–exposed children were significantly lower than those of the IQ–matched control subjects, especially in the interpersonal skills domain, providing additional evidence that the social judgment and relationship problems exhibited by these children are not simply consequences of their intellectual limitations. Thomas and colleagues (1998) also found that the discrepancy between the FAS/FAE children’s chronological age and age–equivalent Vineland score increased as the children grew older. This finding is consistent with both the report by Coles and colleagues (1991) of normal Vineland scores at age 6, when FAS children are frequently characterized as talkative, affectionate, and outgoing, and with the findings by Steinhausen and colleagues (1993) that behavior problems which become evident during childhood do not improve as the FAS patient reaches adulthood.

On the Personality Inventory for Children (PIC), the two domains identified by parents of school–age FAS/FAE children as most problematic were cognitive function and delinquency; the latter is not a prominent domain in most forms of mental retardation (Roebuck et al. 1999). These children were more likely to exhibit antisocial behaviors, lack consideration for the rights and feelings of others, and resist limits and requests by authority figures. This finding is consistent with the reports, cited above, of high levels of aggression in the classroom as well as a report by Streissguth and colleagues (1996) that adults with FAS are more likely to get into trouble with the law and to exhibit sexually inappropriate behavior.

Caveats and Challenges

A detailed review of the current research on the developmental effects of prenatal alcohol exposure reveals some inconsistencies. For example, although arithmetic skill is frequently more impaired than verbal skills, some of the most severely affected patients perform poorly in both domains. Some of the inconsistencies could be caused by differences in the timing of exposure. Different brain regions and processes are most vulnerable at different points during gestation, but it is difficult to obtain accurate data regarding exactly when during the pregnancy the heaviest drinking occurred.

Other factors that lead to inconsistencies include limitations in the accuracy of reported quantities of alcohol ingested per occasion and individual differences in genetic vulnerability. Another limitation of the studies to date is that the domains assessed have been relatively global. Few studies have followed the example of Kopera–Frye and colleagues (1996), who evaluated specific aspects of arithmetic and found that cognitive estimation was more affected than computation per se.

The evidence linking prenatal alcohol exposure to deficits in socioemotional function is based on data from multiple sources, including ratings by parents and teachers and self–reports obtained from adolescents. However, there have been few direct observational studies to identify which specific aspects of socioemotional function are impaired (e.g., empathy, recognition of emotional expression, moral reasoning).

Conclusion

In summary, these data indicate that prenatal alcohol exposure is associated with a distinctive pattern of intellectual deficits, particularly in arithmetic and certain aspects of attention, including planning, cognitive flexibility, and the utilization of feedback to modify a previously learned response. With respect to learning, the acquisition of new information is more likely to be impaired than retention and retrieval of previously learned information. As alcohol–exposed children grow older, deficits in socioemotional function become increasingly salient, particularly with regard to social judgment, interpersonal skills, and antisocial behavior. Although these deficits are most severe and have been documented most extensively in children with FAS, children prenatally exposed to lower levels of alcohol frequently exhibit similar problems.

References

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Prepared: June 2003

 

Drinking during pregnancy, which can result in serious birth defects, remains a significant public health problem despite a variety of prevention efforts that have been implemented in recent years. According to national data collected in 1999 by the Behavioral Risk Factor Surveillance System (BRFSS), a telephone survey of the noninstitutionalized U.S. population, 12.8 percent of pregnant women consumed at least one alcoholic drink during the past month, a decrease from 16.3 percent reported in 1995 (Centers for Disease Control and Prevention [CDC] 2002a). The surveyalso assessed the prevalence of binge and frequent drinking (i.e., five or more drinks on one occasion or at least seven drinks per week) by pregnant women. Comparing data from 1995 and 1999, the investigators found that binge drinking and frequent drinking remained "substantially unchanged." A total of 3.3 percent of pregnant women interviewed in 1999 reported frequent drinking and 2.7 percent reported binge drinking (CDC 2002a). These findings are subject to at least three limitations, however. First, BRFSS data are self-reported and might be subject to reporting biases, especially among pregnant women who are aware that alcohol use is not advised. Second, homeless women, women in homes without telephones, and women who were institutionalized were not surveyed. Both of these limitations could have an impact on prevalence rates. Third, because the proportion of pregnant women who were drinkers was limited in this sample, these estimated prevalence rates are subject to statistical limitations. Thus, the prevalence rates of drinking, frequent drinking, and binge drinking among pregnant women may actually be even higher than indicated in the BRFSS study.

The following sections describe each of these major types of FAS prevention efforts and summarize research on their effectiveness.

UNIVERSAL EFFORTS AND THEIR IMPACT

One of the first steps in universal prevention efforts is to increase the public's knowledge of the consequences of alcohol use during pregnancy, particularly FAS. Various methods can be used to increase knowledge, including news reports, articles in the popular press, public service announcements, billboards, and the alcohol beverage warning label. With the exception of the research on the warning label, few studies have assessed the effectiveness of these efforts on knowledge of FAS, attitudes about drinking during pregnancy, and women's actual alcohol consumption during pregnancy.

Extent of Media Attention to Drinking During Pregnancy

Lemmens and colleagues (1999) reviewed the coverage of alcohol-related issues in five national newspapers (i.e., New York Times, Los Angeles Times, Washington Post, Christian Science Monitor, and Wall Street Journal) from 1985 through 1991 by randomly sampling articles dealing with beverage alcohol. Out of 1,677 articles examined, only 23 dealt with alcohol and pregnancy. Similarly, Golden (2000) reviewed national network evening news broadcasts between 1977 and 1996 for ABC, CBS, NBC and found that alcohol and pregnancy was a topic in only 36 of the newscasts.These particular newscasts often coincided with the announcement of government warnings, the discovery of scientific evidence linking alcohol to birth defects, and other incidents associated with alcohol abuse deemed newsworthy, such as the firing of a bartender and waitress who refused to serve alcohol to a pregnant woman.

Warning Posters

Warning posters to be placed where alcohol is sold have been required in some States as early as 1983. As of 1993, 18 States, 14 cities, and 2 counties required the display of such posters.

Prugh (1986) examined the impact of posters warning about drinking during pregnancy in New York City. Prior to the posters, 54 percent of respondents mentioned birth defects as a result of drinking while pregnant. A year after the posters were introduced, 68 percent mentioned birth defects as a consequence of drinking.

Using a national sample of 4,000 adults in 1990–1991, Kaskutas and Graves (1994) found that 31 percent of respondents saw a sign or poster warning about health effects of alcohol. Among those seeing a sign or poster, 56 percent recalled a warning about alcohol and birth defects. The investigators also reported that the level of knowledge of the risks associated with drinking during pregnancy increased with an increasing number of different message sources (e.g., posters, warning label, and advertisements). Among the 142 women in the survey who had been pregnant in the past year, 86 percent saw 1 or more messages about drinking while pregnant. Eighty-seven percent of women who had been pregnant versus 58 percent of women of childbearing age who had not been pregnant had a discussion about alcohol and the risk of birth defects (p<.05). Thirty-six percent of the women who had been pregnant and were drinkers reported limiting their drinking for "health reasons" compared with 25 percent of the nonpregnant women (p<.05). Finally, 70 percent of the women who had been pregnant reported that they did not drink alcohol while pregnant (Kaskutas and Graves 1994).

Evidence that Knowledge of FAS Has Increased over Time

One study has tracked the level of knowledge of FAS over time using data from the National Health Interview Surveys that involved interviews with 19,000 people ages 18 to 44 in 1985 and with 23,000 people in 1990 (Dufour et al. 1994). Over the 5-year period between the two surveys, the proportion of respondents reporting that they had heard about FAS increased significantly, from 62 percent to 73 percent among women and from 49 percent to 55 percent among men.

Among women who had heard of FAS, the number of those who correctly defined the condition as a birth defect increased significantly from 25 percent to 39 percent. Among men, the percentages also increased significantly from 24 percent in 1985 to 36 percent in 1990.

Although this study did not test the effectiveness of particular universal interventions, the findings suggest that general knowledge of FAS has increased over time.

Effectiveness of the Alcohol Beverage Warning Label

In 1988, the U.S. Congress passed the Alcoholic Beverage Warning Label Act requiring that effective November 18, 1989, a warning label must be attached to all containers of alcoholic beverages. The first part of the warning reads: "Government Warning: According to the Surgeon General, women should not drink alcoholic beverages during pregnancy because of the risk of birth defects." Various researchers have examined exposure to the warning label and its impact on drinking during pregnancy. In general, the studies concluded that although awareness of the alcohol beverage warning label increased after the implementation of the law, this awareness has attenuated over time. Furthermore, the warning label's impact on drinking during pregnancy has been modest. (For a comprehensive review of the impact of the alcohol warning label on perception of risks including drunk driving, birth defects, and health problems; and drinking behavior in a variety of situations, see Mackinnon 1995.)

For example, Greenfield and Kaskutas (1998) examined exposure to the warning label among a national probability sample of adults using annual cross-sectional telephone surveys.1 (1The term “probability sample” means that the sample was created to be representative of the U.S. population (e.g., included the same numbers of males, females, Blacks, Whites as the population). In a cross-sectional design, each participant is interviewed only once and a new sample is created for every year of the survey.) For that study, interviews were conducted in 1989, 1990, 1991, 1993, and 1994 that included a total of approximately 8,000 respondents. In 1990, 6 months after the implementation of the label, 21 percent of respondents said they had seen the warning label during the past 12 months. By 1994 exposure to the label had reached a plateau, according to the investigators, with 51 percent of respondents reporting that they had seen the label in the past 12 months.

As part of a cross-sectional and longitudinal study of the effects of alcohol beverage warning labels, Kaskutas and colleagues (1998) conducted a phone survey of a national representative sample of 365 pregnant women from 1989 through 1994. Exposure to the warning label fluctuated over the course of the study (7 percent saw the label in 1989, 27 percent in both 1990 and 1991, 58 percent in 1993, and 42 percent in 1994 [no data was collected in 1992]). Exposure to signs or posters also varied over the study period from a high of 28 percent in 1991 to a low of 13 percent in 1993 (1989, 21 percent; 1990, 17 percent; 1994, 17 percent). Advertisements about drinking during pregnancy were seen by 81 percent of women during 1989, 1990, and 1991, but by fewer women in 1993 and 1994 (65 percent and 58 percent, respectively). Finally, 84 percent of women had conversations about drinking during pregnancy in both 1989 and 1991, and 87 percent in 1990, but only 74 percent in 1993 and 58 percent in 1994. These data suggest changes, and in some cases, decreases in the proportion of women exposed to these media messages over time.

Seventy-five percent of the women reported not drinking, whereas 21 percent had one or two drinks and 4 percent admitted drinking at least three drinks on any single day during pregnancy. However, the 1989–1994 data showed no statistically significant relation between drinking patterns during pregnancy and exposure to any of the types of messages assessed in the surveys (Kaskutas et al. 1998).

Several other studies have tracked the awareness of warning labels in various populations, as follows:

Using the same inner-city prenatal clinic, Hankin and colleagues (1998) examined the impact of the warning label on drinking during pregnancy. This study involved 21,127 pregnant African American women using the prenatal clinic between 1986 and 1995. Controlling for patient characteristics and the unemployment rate,3 drinking began to decline 8 months after the implementation of the warning label (Hankin et al. 1998). (3Long-term drinking trends have been related to unemployment rates. For example, pregnant women may drink more when they have fewer resources and support. Furthermore, when unemployment is high, choices for prenatal care are limited, and more poor pregnant women may turn to the prenatal clinic where the study was conducted. Hankin and colleagues hypothesize that pregnant women may drink more when unemployment is high. They were unable to find any study that specifically examined this relationship. However, the following studies show that alcohol consumption, binge drinking, alcohol problems, and alcohol-related diseases are related to unemployment rates: Crawford, A.; Plant, M.A.; Kreitman, N.; and Latcham, R.W. Unemployment and drinking behavior: Some data from a general population survey of alcohol use. British Journal of Addiction 82: 1007–1016, 1987; Brenner, M.H. Economic change, alcohol consumption, and heart disease mortality in nine industrialized countries. Social Science and Medicine 25:119–132, 1987; Linksy, A.S. ; Straus, M.S.; and Colby, J.P., Jr. Stressful events, stressful conditions, and alcohol problems in the United States: A partial test of Bale’s Theory. Journal of Studies on Alcohol 46:72–80, 1985; Catalano, R.; Dooley, D.; Wilson, G.; and Hough, R. Job loss and alcohol abuse: A test using data from the Epidemiologic Catchment Area Project. Journal of Health and Social Behavior 34:215–225, 1993.)However, this decline was only modest (i.e., 0.05 ounces of absolute alcohol per week or approximately 1 ounce of beer) and appeared to be short-lived. Thus, by 1992, the women's alcohol consumption rose again and by 1995, pregnant women had become accustomed to the message.

SELECTIVE EFFORTS AND THEIR IMPACT

Selective prevention targets all women in their reproductive years who drink alcohol (although most studies target heavy drinkers).

One randomized trial assessed the impact of a brief intervention on drinking during pregnancy in this population (Chang et al. 1999, 2000). Women initiating prenatal care at Brigham and Women's Hospital in Boston, MA, were screened for their alcohol use using a brief questionnaire called the T-ACE4 (4The T-ACE consists of four questions and yields a maximum score of five points. Women who score two or more points are considered risk drinkers.) (Sokol et al. 1989). The first 250 women who were identified as risk drinkers using this questionnaire and who had consumed alcohol in the previous 6 months were randomly assigned to an assessment-only group (n = 127) or to a brief intervention group (n = 123). The brief intervention consisted of a 45-minute session with a physician and included the articulation of drinking goals while pregnant, identification of risk situations for drinking and alternatives to drinking, and the recommendation of abstinence during pregnancy from the Surgeon General and the Secretary of Health and Human Services. The study investigators then interviewed women once they had given birth about their alcohol consumption since the original assessment. Women in both groups reduced their alcohol consumption during pregnancy, and no difference existed between the two groups in the decrease in average number of drinks per drinking day. Accordingly, Chang and colleagues (1999) concluded that screening alone may be related to a reduction of drinking during pregnancy.

The study also attempted to identify patient characteristics that predicted greater success of the intervention approach. For example, the brief intervention appeared most successful for women who had been drinking alcohol in the previous 6 months but who had been abstinent in the 90 days prior to their first prenatal visit. Among current drinkers at baseline in the brief intervention group, women who articulated specific drinking goals for specific reasons were more likely to reduce alcohol consumption or abstain from alcohol during pregnancy than were women without such goals (Chang et al. 2000).

An ongoing randomized clinical trial is extending these selective prevention efforts by applying them to an indicated prevention program. In this trial, recruitment focuses on a high-risk population of 300 pregnant women who are currently drinking, drank during a previous pregnancy, or drank at least one drink daily prior to current pregnancy. In this study, the investigators, led by Chang, are comparing the results of an assessment-only condition with an enhanced brief intervention that involves a support partner chosen by the pregnant woman.

Handmaker and colleagues (1999)piloted a study to evaluate the results of motivational interviewing with 42 pregnant problem drinkers. Women reporting any recent drinking were randomly assigned either to the experimental group that received a 1-hour motivational interview focused on weighing drinking against the risk of birth defects, or to a control group that received a letter explaining the risks of drinking during pregnancy and recommending the woman talk to her obstetrical provider about the risks. Women in both groups had significantly reduced their alcohol intake at followup 2 months later. Women who self-reported the highest levels of blood alcohol concentrations had the greatest decrease in alcohol consumption if they were in the experimental group compared with the control group. (Blood alcohol concentrations were estimated using computer projections that were based on self-reports of estimated number of drinks, alcohol content of drinks, length of drinking episodes, the woman's weight, and an average rate of alcohol metabolism for women.)

Another selective prevention approach that was part of the Developing Effective Educational Resources (DEER) project examined the exposure and reactions to warnings about drinking during pregnancy in samples of 321 pregnant Native Americans and African Americans living in the Northern California Bay area and Los Angeles. In this study, Kaskutas (2000) found that although the women were frequently exposed to warning messages, they were uncertain about the impact of FAS. Specifically, only about a quarter of the women could name at least one birth defect associated with FAS and only one-fifth knew that FAS was related to alcohol consumption.

Furthermore, the women did not understand the benefits of quitting drinking at any time during pregnancy, and they had the misconception that wine, beer, and wine coolers are safer to drink during pregnancy than liquor. Finally, most of the women underestimated their drinking. Thus, when the investigator compared alcohol intake using standard drink sizes5 (5A standard drink frequently is defined as 12 ounces of beer, 5 ounces of wine, or 1.5 ounces of distilled spirits, each of which contains approximately 0.5 ounces (14 grams) of pure alcohol.) with self-defined drink sizes (assessed with the help of beverage containers and photos), consumption by risk drinkers was 2 to 3 times higher using self-defined drink sizes compared with standard size drink measurements.

Ongoing research is extending this methodology and testing a novel prevention program for pregnant women enrolled in a health maintenance organization (Kaskutas and Graves 2001). In this randomized clinical trial, the investigators use models of alcoholic beverage containers (beverage containers of various sizes, such as 12-ounce versus 40-ounce beer bottles or beer cans, or liquor bottles that range from 375 milliliters, 750 milliliters, and 1 liter) or drinking vessels (shot glasses, wine glasses, or drinking glasses with lines marked off with letters so women could tell the investigators how high they filled the glass) and a computer program to help pregnant women understand how much they actually drink.

After the women identify the bottle or glass they typically drink from, the computer program calculates the absolute ounces of alcohol consumed. These nonconfrontational approaches of using drinking vessels and beverage containers and talking about drinking in a nonthreatening way help the women discuss their drinking habits while pregnant.

INDICATED EFFORTS AND THEIR IMPACT

Indicated prevention efforts are directed toward the population at highest risk of having children with FAS or alcohol- related effects-that is, women who have a history of drinking during pregnancy or have previously delivered a child affected by alcohol. Several studies have assessed prevention approaches directed at this population to prevent the birth of further alcohol-affected children. (Handmaker and Wilbourne [2001] thoroughly review motivational interventions in prenatal clinics, describing additional approaches not mentioned here.)

One of these approaches was the Protecting the Next Pregnancy project, which targeted women who had been identified as drinking heavily during the last pregnancy (called the index pregnancy). The goal of the intervention being tested was to reduce the women's drinking during their next pregnancies (Hankin and Sokol 1995; Hankin et al. 2000). All women consuming at least four drinks per week (i.e., 0.3 ounces absolute alcohol per day) at the time they conceived during the index pregnancy were approached in the hospital's postpartum unit and asked to participate in the trial. (The women's average alcohol consumption was 1.2 ounces of absolute alcohol per day, or more than 16 drinks per week, at the time of conception for the index pregnancy.) Four weeks after giving birth, the women were randomly assigned to an experimental group that received an intensive brief intervention or a control group that received standard clinical care. The study included 300 women, who were followed up to 5 years.

The brief intervention involved a one-on-one method, which was based on a cognitive behavioral approach, and included 5 sessions beginning at 1 month after giving birth and continuing for 12 months. In those sessions, the counselor reviewed the definition of a standard drink, helped the women set the goal of abstention or reduction of alcohol use, established limits on consumption (if not abstaining), and taught ways to reduce drinking. Additional booster sessions were conducted over the 5-year followup period. The control group was simply advised that "You can have a healthier baby if you cut back or stop drinking during pregnancy."

Of the 300 participants, 96 women delivered 1 or more infants during the followup period. The investigators found that women in the experimental group drank significantly less than did women in the control group during the subsequent pregnancies. While 25 percent of the women in the control group drank at least 0.3 ounces of absolute alcohol per day, only 11.8 percent of the women in the experimental group drank at that risk level (chi-square 2.4, p < .06, 1-tailed [Hankin and Sokol 1995; Hankin et al. 2000]). Furthermore, among women who drank during subsequent pregnancies, those from the experimental group drank about half as much as did women from the control group (i.e., 0.32 ounce versus 0.65 ounce absolute alcohol per day, t = 2.08, p < .03, 1-tailed). This reduced alcohol consumption resulted in improved birth outcomes among women from the experimental group, including fewer low-birth weight babies and fewer premature births. In addition, children born to women from the experimental group exhibited better neurobehavioral performance at 13 months of age compared with the children of women from the control group. These findings indicate that the brief intervention protected the next pregnancy by reducing alcohol consumption and improving infant outcomes.

In another indicated prevention effort called Project TrEAT (Trial for Early Alcohol Treatment) researchers screened almost 6,000 women ages 18 to 40 for problem drinking and then randomly assigned 205 problem drinkers to a brief intervention program or to a control group (Manwell et al. 2000). The two groups did not differ significantly with respect to various factors, such as alcohol use, age, socioeconomic status, smoking, various psychiatric disorders, lifetime drug use, or health care utilization. The brief intervention in this study consisted of two 15-minute counseling sessions conducted by physicians and including a review of the woman's current health behavior, a discussion of the adverse effects of alcohol, a drinking agreement, and cards to record alcohol intake. The control group received a booklet on general health issues. Participants were followed for 48 months. Women in the brief intervention group successfully reduced their mean alcohol intake by 48 percent, and the proportion of women reporting any binge drinking in this group decreased from 93 percent to 68 percent. The control group also exhibited modest declines in alcohol use.

During the followup period, 41 women became pregnant, including 22 in the brief intervention group and 19 in the control group. For these women, the brief intervention seemed to result in better outcomes in terms of decreased consumptionbecause women in the brief intervention group reduced their alcohol consumption from 13.6 to 3.5 drinks per week, compared with a decrease from 13.5 drinks to 10.1 drinks per week for women in the control group.

Another example of a treatment program targeting women who have already given birth to alcohol- or drug-exposed infants was the Seattle Birth to 3 Advocacy Project (Streissguth 1997). This program was designed for women who were heavy users of alcohol or other drugs, had no prenatal care, and were not connected to service providers during their pregnancy. Specially trained paraprofessionals,6 (6These were women with backgrounds similar to the clients’ (e.g., in terms of previous obstacles in their lives, such as alcohol use, poverty, single parenthood, or family violence) who had completed 2 years of college and had been trained in alcohol and other drug treatment, child development, parenting skills, and community resources.) acting as advocates, worked on a one-on-one basis with the women and their families over a 3-year period. The 65 women in the program, most of whom were unemployed or on welfare, learned how to set goals, connect with other providers, and acquire new skills. After 2 years, 80 percent of the women had received alcohol and other drug abuse treatment, and 60 percent had remained abstinent from alcohol and other drugs. Moreover, 62 percent of the women were using long-term birth control methods, thereby reducing the risk for another alcohol- or drug-exposed pregnancy.

ADDITIONAL EXAMPLES OF ONGOING FAS PREVENTION RESEARCH

Several other programs are studying different FAS prevention efforts in a variety of target populations and settings. For example, Project CHOICES (Changing High-Risk AlcOhol Use and Increasing Contraception Effectiveness Study), which is funded by the Centers for Disease Control and Prevention (Floyd et al. 1999), is a selective prevention effort to prevent alcohol exposure during pregnancy among women of childbearing age in special settings. These populations include women in a jail, in a substance abuse center, or in clinics as well as a group of women with concerns about problem drinking who were recruited through media announcements. The program uses a brief intervention to reduce alcohol use and/or postpone pregnancy until drinking problems are resolved.

Another recently funded study is aimed at college students, encouraging them to abstain from alcohol or to use contraception if they drink. The goal of this program is to reduce alcohol use and promote effective contraception among women who are not currently pregnant. The program uses a brief intervention that educates women about the consequences of problem drinking, the benefits and costs of changing drinking and contraception behavior, setting goals, keeping a daily diary, and followup support.

An ongoing prevention effort on Native American reservations is based on the Institute of Medicine model and incorporates universal, selective, and indicated prevention activities (May 1995). The study includes four prevention communities and two "research only" communities. The selective prevention component consists of a screening program for women in clinics and Women, Infant, and Children (WIC) sites to identify high-risk drinkers. The indicated prevention component involves case management using motivational interviewing and community reinforcement approaches to help women who are drinking during pregnancy. The two sets of communities will be compared on a variety of outcome measures.

NIAAA is funding several other prevention studies of interventions designed to reduce drinking among pregnant women. (Information about these studies can be obtained from the Computer Retrieval Information on Scientific Projects [CRISP] database at http://crisp.cit.nih.gov.) Most of these efforts use brief interventions with motivational interviewing. Another program that is based at WIC clinics seeks to increase the detection of alcohol use during pregnancy, identify maternal characteristics contributing to the success of a brief intervention, identify characteristics of the intervention itself that contribute to its effectiveness, and evaluate the impact of the program on infant outcome. Finally, NIAAA is funding a study that is based on a more environmentally focused perspective and that examines the impact of alcohol server education in FAS prevention. All of these prevention efforts are ongoing, and researchers are still waiting for data on the results of these programs.

DISCUSSION

As noted by NIAAA, "Unfortunately, many women continue to drink during pregnancy. Furthermore, many of the women who continue to drink during pregnancy are at highest risk for having children with fetal alcohol syndrome and related problems. Thus, finding potent new ways to reach populations at risk and to influence changes in their behavior remains a challenge for alcohol research" (NIAAA 2000b, p. 3).

Researchers and clinicians already have made some progress in the efforts to prevent FAS. For example, universal prevention approaches have increased the general public's knowledge about the results of drinking during pregnancy. Studies on awareness of the alcohol beverage warning label showed an increase in awareness over time. In addition, a larger proportion of the public knows about the relationships between drinking during pregnancy and birth defects. However, knowledge is not enough to change norms and actual behavior, as indicated by recent data that almost 13 percent of pregnant women drink during pregnancy (CDC 2002a). Numerous questions remain to be answered. For example, although the alcohol beverage warning label had a modest impact on drinking during pregnancy for a short time, the public has become habituated to its message. Future analyses need to clarify why this habituation occurred and whether new labels or a system of rotating labels can prevent habituation. Additional research must identify the most effective ways to educate the public about FAS (e.g., revised alcohol beverage warning labels, warning posters, public service announcements, or news reports). Systematic studies are needed that compare various universal prevention efforts and their impacts across various social groups.

Several researchers have examined the effects of selective and indicated prevention efforts using randomized clinical trials. The results described in this article suggest that brief interventions for pregnant women can successfully reduce alcohol intake during pregnancy. Additional studies using experimental designs (i.e., random assignment of study participants to an intervention group or to a control group that just receives standard clinical care) are necessary, however, to determine whether these findings are generalizable to pregnant women in diverse settings or whether the interventions need to be tailored to pregnant women from different ethnic and socioeconomic groups. Other unanswered questions concern the most appropriate contents for the brief intervention. Finally, it is important to understand whether the intervention results in clinically significant results across a variety of outcomes, including drinking during pregnancy, infant birth weight, length of gestation, and infant neurobehavioral outcomes. Although the research on the success of FAS prevention programs is still in its infancy, ongoing studies may help researchers and clinicians discover the best methods for separating alcohol from pregnancy and thus preventing FAS and alcohol-related effects.

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