More than 40 studies have been done on seasonal birth patterns for schizophrenia, but only two small studies have been done for DSM-III-R bipolar disorder and none for schizoaffective disorder.
Two studies have also reported a significant relationship between schizophrenia births and stillbirths.
In the largest study to date, birth data from four states was obtained on 126987 state psychiatric hospitals inpatients divided into'process'schizophrenia (disorganized, catatonic, undifferentiated), paranoid schizophrenia, schizoaffective disorder, bipolar disorder and major depression.
Time series analysis compared these births to all general births and to stillbirths.
Process'schizophrenia, paranoid schizophrenia, schizoaffective disorder and bipolar disorder all had statistically significant seasonal excess births from December through March (p=0.0000).
The largest excess was 5.8% for bipolar disorder.
Major depression had significant excess births from March through May.
Time series analysis showed statistically significant coherences between major depression and bipolar disorder (0.995) and between schizoaffective disorder and both'process'schizophrenia (0.977) and bipolar disorder (0.977).
Unexpectedly, a significant coherence was also found between paranoid schizophrenia and bipolar disorder (0.972). (...)
Mots-clés Pascal : Schizophrénie, Psychose schizoaffective, Psychose, Etude comparative, Etat dépressif, Trouble humeur, Trouble bipolaire, Date naissance, Mort né, Enquête, Epidémiologie, Homme
Mots-clés Pascal anglais : Schizophrenia, Schizoaffective psychosis, Psychosis, Comparative study, Depression, Mood disorder, Bipolar disorder, Birth date, Stillborn, Inquiry, Epidemiology, Human
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 96-0431501
Code Inist : 002B18C06A. Création : 10/04/1997.