Psychological Medicine

Preliminary Communication

Two-year follow-up of the patients included in the WHO International Pilot Study of Schizophrenia1

N. Sartoriusa1, A. Jablenskya1 c1 and R. Shapiroa1

a1 Division of Mental Health, WHO, Geneva, Psychochemistry Institute, University of Copenhagen


Over 90% of the 1202 patients investigated in the 9 centres collaborating in the International Pilot Study of Schizophrenia were traced 2 years after the initial examination and on the average over 75% of them were re-examined, using standardized instruments and methods. Results indicate that patients diagnosed as schizophrenic on the basis of standardized assessments and clearly specified diagnostic criteria demonstrated very marked variations of course and outcome over a 2-year period. Schizophrenic patients in the centres in developing countries had considerably better course and outcome than schizophrenic patients in the centres in developed countries.


c1 Address for correspondence: Dr A. Jablensky, Division of Mental Health, WHO, Geneva, Switzerland.


1 This project is sponsored by the World Health Organization and funded by the World Health Organization, the National Institute of Mental Health (USA) and the participating field research centres.