Figure 2:

Participant selection for the study. CONSORT diagram illustrating sequential exclusion of children with incomplete data for exposures, outcomes and covariates. Note: CHILD = Canadian Healthy Infant Longitudinal Development Cohort. *Participants in the Vanguard Pilot study were a subset of the CHILD cohort study used to test the exposure assessment approaches. Questionnaires used in the Vanguard Pilot group differed slightly from the questionnaires used for the rest of the CHILD Cohort Study.