Season of Birth Variations in Dimensions of Functioning Evaluated by the Diagnostic Interview for Borderline Patients

Two samples of data were analyzed to investigate the relationship between the season of birth & the Diagnostic Interview for Borderline Patients. The first sample comprised 202 patients participating in psychobiological research in Stockholm & the second sample comprised 130 patients who committed suicide in Vasterbotten in northern Sweden. Some of the results indicated those subjects with intermediate scores for impulse action patterns were significantly more likely to have been born during October-January in the pooled data & in separate analyses for the 2 samples & 2 diagnostic groups of mood disorders & schizophrenia. Results throw further light on the role of season of birth in suicidology & in psychiatric morbidity. (26 refs.)