Document Detail

Season of birth of schizophrenics in a recent Japanese sample.
MedLine Citation:
PMID:  9316166     Owner:  NLM     Status:  MEDLINE    
An excess of schizophrenic births in winter or early spring is a well replicated finding in studies on Western populations. However, there are few studies on Asian populations, and their results are not consistent. We examined the seasonality of schizophrenic births in Japanese subjects (n = 1024) born between 1955 and 1960. Our results showed a significant inverse relationship between temperature and number of schizophrenic births, which is in line with the findings in Western populations. In our data, observed reduction of schizophrenic births in summer was more marked than excess births in winter. We suggest the possibility that birth in summer may have some advantage in brain growth early in life, which results in reducing the risk of developing schizophrenia.
H Kunugi; S Nanko; N Hayashi; K Saito; T Hirose; H Kazamatsuri
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  Psychiatry and clinical neurosciences     Volume:  51     ISSN:  1323-1316     ISO Abbreviation:  Psychiatry Clin. Neurosci.     Publication Date:  1997 Aug 
Date Detail:
Created Date:  1997-11-21     Completed Date:  1997-11-21     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  9513551     Medline TA:  Psychiatry Clin Neurosci     Country:  AUSTRALIA    
Other Details:
Languages:  eng     Pagination:  213-6     Citation Subset:  IM    
Department of Psychiatry, Teikyo University School of Medicine, Japan.
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MeSH Terms
Cross-Cultural Comparison*
Japan / epidemiology
Prenatal Exposure Delayed Effects
Risk Factors
Schizophrenia / diagnosis,  epidemiology*,  etiology

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