Long-term dosage effects of psychodynamic and schema therapy in depressed patients with personality disorders: 18 and 24 months follow-up of a randomized controlled trial

Higher psychotherapy dosage led to faster initial improvements, but long-term outcomes were not superior to those achieved with a lower dosage. These results should be interpreted with caution, as unregulated treatment during follow-up reduced the power to detect significant dosage effects. Both SPSP and ST provide viable alternatives to treatments focused solely on depression.