[Statistical investigations of nosological parameters (sex distribution, diagnosis, age of onset) in 120 pairs of endogenous psychotic parent-child and sibling relationships (author's transl)].

120 pairs of parent-child and sibling relationships with endogenous psychoses--registered through 60 schizophrenic and manic-depressive probands each--are statistically investigated with regard to the nosologically and biologically relevant parameters of sex distribution, diagnosis and age of onset.