دوره بلند مدت ساب دامنه علائم منفی و ارتباط با نتیجه در بیماران مبتلا به اختلال روانگردان

In many patients the course of negative symptoms is unstable and related to the course of outcome. Patients who do show steady low negative symptom levels (60%) may complicate the interpretation of treatment evaluation studies, as they may average out possible effects in subgroups with fluctuating symptom levels.