Based on these results, binary logistic regression analyses were utilized to predict FASD from maternal drinking (DDD) by trimester (Table 5). Seven analyses were conducted, and three were statistically significant at the Bonferroni-adjusted level (α= .007). The odds of giving birth to an FASD child are 12 times greater for mothers who reported drinking only during the first trimester compared to those who reported no drinking, although the 95% confidence interval is quite large (4.13 to 35.8). Nagelkerke R2 = .27 suggests that a little over a quarter of the variability in FASD is predictable from first trimester drinking. The odds of giving birth to an FASD child increase to about 61 times greater than for non-drinking mothers (95% CI, 13 to 291) for mothers who drink during the first and second trimesters only. The odds of giving birth to an FASD child further increase to about 65 times greater (95% CI, 23 to 180, Nagelkerke R2 = .65) for mothers who reported drinking during all trimesters.
