[Diagnosis in a psychiatric case register].

This study examines the stability of psychiatric diagnosis over a five-year period and its agreement with the diagnosis of a case register. The stability of diagnosis over a period of time has two component parts: the course of the morbid process and the reliability of the diagnostic technique. We studied the importance of these components as far as the cause of disends in diagnostic changes, the discrepancy of instability in different diagnostic categories and factors which may possibly indicate instability of psychiatric diagnosis.