The British Journal of Psychiatry 130: 506-508 (1977)
© 1977 The Royal College of Psychiatrists
Survival of nieces and nephews of schizophrenic patients
C Buck, H Simpson and JM Wanklin
Evidence was found against the hypothesis that heterozygous carriers of a
schizophrenic gene have a reproductive advantage through enhanced
fertility. In consequence an investigation was made of the possibility that
an advantage is gained through diminished early mortality among the
off-spring of carriers. The results were equivocal. While an observed
deficit of infant deaths was attributable to under-reporting, the
possibility of a true advantage could not be ruled out, because of the
statistical unreliability of the findings in a sample of the size
available. A plea is made for a collaborative effort to settle the issue.