Study protocol: Asking QUestions about Alcohol in pregnancy (AQUA): a longitudinal cohort study of fetal effects of low to moderate alcohol exposure

Table 4 AQUA cohort attrition between pregnancy questionnaires

Reason for attrition	After Q1	After Q2	After Q3
Dropped-out (loss to follow-up)	383	138
Withdrew	11	3	3
Fetal loss	18	2	2
Administrative reason (e.g. scheduling error)	19	1
Total n = 586	431	144	5

ISSN: 1471-2393