(0.27–0.52) <0.001 179 0.61 (0.42–0.88) <0.01 141 0.19 (0.12–0.30) <0.001 N: Sample size for multivariate analysis (i.e. number of cases with a complete set of predictors, except for income, where a ‘missing’ category was included because ~ 4 % of missing data)AOR (95 % CI): Odds ratio and 95 % confidence interval adjusted for all predictors shown in table. Control group is abstinence in pregnancy, but not lifetime abstainer. Results are in bold font where a significant difference was found. For predictor variables with more than two categories (maternal age, perceived alcohol effect, income, BMI and education), p values from likelihood ratio tests (not shown) were used to evaluate the predictors. Likelihood ratio p values were <0.01 in all bolded results a : Control group is abstinence in pregnancy, but not lifetime abstainerTable 5Predictors of pregnancy alcohol use: Tier 3Drank in trimester 1, abstinent in trimester 2 and 3Drank throughoutPAE levelLowModerate/highBinge pre-awareLow in trimester 1Moderate/high in trimester 1Binge pre-aware N AOR95 % CI p valueNAOR95 % CI p value N AOR95 % CI p value N AOR95 % CI p value N AOR95 % CI p value N AOR95 % CI p valueParticipants597626582571646626 Maternal age <30 years209Reference218Reference219Reference191Reference212Reference207Reference30-34 years2281.11(0.68-1.82)0.672421.46(0.92–2.32)0.112090.90(0.51–1.61)0.732291.62(0.91–2.90)0.102471.51(0.91–2.50)0.11264 2.58 (1.54–4.31)
