No season-of-birth effect in schizophrenic patients from a tropical island in the Southern Hemisphere.
Psychiatry Res
; 60(2-3): 205-10, 1996 Mar 29.
Article
en En
| MEDLINE
| ID: mdl-8723312
ABSTRACT
The distribution of birth rates was examined in 668 schizophrenic patients born in Réunion, a tropical French island in the Southern Hemisphere, and compared with that in the general local population. We failed to observe a significant season-of-birth effect, either in the total sample of schizophrenic patients or in subgroups categorized by gender, age, or family history of schizophrenia. Seasonal factors do not appear to affect the yearly distribution of births among schizophrenic patients on Réunion Island. It is nevertheless possible that environmental factors which are seasonal in countries with more contrasting climates have a continuous effect, throughout the whole year, in subtropical areas. Conversely, these findings provide some evidence against the hypothesis that there is an age-incidence artifact in seasonal studies from countries in the Northern Hemisphere.
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Banco de datos:
MEDLINE
Asunto principal:
Esquizofrenia
/
Estaciones del Año
/
Clima Tropical
Tipo de estudio:
Diagnostic_studies
/
Etiology_studies
/
Incidence_studies
/
Observational_studies
/
Prevalence_studies
/
Prognostic_studies
/
Risk_factors_studies
Límite:
Adult
/
Aged
/
Aged80
/
Female
/
Humans
/
Male
/
Middle aged
Idioma:
En
Año:
1996
Tipo del documento:
Article