Each of 51 experienced psychiatrist/psychoanalysts was queried about the clinical characteristics of every private psychotherapy patient presently in treatment: 551 patients were included in the study; 88% of patients had an Axis I disorder, 59% had Axis I and Axis II disorders concurrently, and 11% Axis II only. Of these patients, 44% had been prescribed psychotropic medication on a daily basis for at least 2 weeks during the present treatment. Patients treated for the longest time (5 years or more) were the most seriously psychiatrically disturbed. Patients improved with psychotherapy, and the improvement was related to the duration of treatment. The combined impact of diagnosis status, treatment duration, and treatment modalities provided a consistent pattern of treatment effectiveness.