From: Infant siblings and the investigation of autism risk factors
 | Mother |  |  |  | ||
---|---|---|---|---|---|---|
Data collection mode | Preconception | Prenatal | Perinatal | Father | Proband | Sibling |
Self-report retrospective | X | X | Â | X | X | X |
Self-report prospective | Â | X | Â | Â | Â | X |
Biologic sampling | Â | X | X | X | X | X |
Direct observation (home environment) | Â | X | Â | Â | Â | X |
Environmental sampling | Â | X | Â | Â | Â | X |
Medical recordsa | X | X | X | X | X | X |