Duration of pretreatment phases in schizophrenia: Women and men

Objective: To determine the relative duration of prepsychotic prodrome and the period of untreated psychosis in women and men with schizophrenia. Method: From a larger study population, we selected 27 women and 34 men tre ated at 1 facility. To determine the time of first behavioural change and t he time of first psychotic symptoms, we administered the Interview for the Retrospective Assessment of the Onset of Schizophrenia (IRAOS). Subjects' m others were interviewed using the same instrument. Time of first treatment was determined by hospital record. Results: The first sign of behavioural disturbance occurred at approximatel y the same age in women and men. The prepsychotic prodrome was almost twice as long for women as for men. The duration of untreated psychosis did not differ between the 2 sexes. Substance abuse did not influence the observed difference between men and women in the duration of the prepsychotic phase. The interval between first behavioural sign and first treatment was, on av erage, 6 years for men and 9 years for women. Conclusion: As-yet-unknown factors speed up the progression from nonspecifi c symptoms to psychosis in men or delay it in women.