A study following 280 patients suffering from chronic depression compared patients' conditions at time of assessment, before treatment, after treatment, and one year after treatment. Patients were either placed in an inpatient program or on a waiting list. Researchers found that participants who were placed in one of two inpatient programs scored significantly lower on the Beck Depression Inventory - II after treatment compared to those who were placed on a waiting list. Thus, the inpatient programs proved to be notably effective for individuals with chronic depression.