outcomes in mothers who do not drink daily during pregnancy, the primary analyses were repeated using a 4-level variable of drinking in pregnancy separating out patterns (≥4 drinks in a day) and frequency (daily drinking involving an average of at least one drink per day) of drinking. We compared, in turn, three sub-groups of mothers (those who drank daily but not ≥4, ≥4 but not daily, ≥4 and daily) against the baseline group who had neither consumed ≥4 drinks in a day nor drank daily during the pregnancy. The analyses for KS2 outcomes were further adjusted for highest level of paternal education.
