Season of birth of siblings of schizophrenic patients.

Pulver, A E; Liang, K Y; Wolyniec, P S; McGrath, J; Melton, B A; Adler, L; Childs, B · Br J Psychiatry · 1992

case_control · Level III

Where this comes from

Abstract

The hypothesis that mothers of winter-spring-born schizophrenics have an unusual pattern of conception which results in an excess of winter-spring births was tested by studying the distribution of birth-dates of 401 siblings of 120 winter-spring-born schizophrenics and 157 siblings of 59 winter-spring-born controls. All analyses were gender-specific. The results suggest there is no association between the probability of a winter-spring date of birth and being a sibling of a winter-spring-born schizophrenic or control.

Medical subject headings