Objective: This study examined whether psychiatric case review was associated with depression medication modification in a large implementation program of collaborative care for depression in safety-net primary care clinics.
Methods: Registry data were examined from an implementation of the collaborative care model in Washington State. A total of 14,960 adults from 178 primary care clinics who initiated care between January 1, 2008, and September 30, 2014, and who had a baseline Patient Health Questionnaire-9 (PHQ-9) score of 10 or higher were included. Rates of psychiatric case reviews and receipt of new depression medications were extracted from the registry for all patients and for a subset of patients who did not improve by eight weeks of treatment (did not achieve a PHQ-9 score of less than 10 or a reduction in PHQ-9 score of 50% or more, compared with baseline).
Results: One-half of patients received a new depression medication. Psychiatric case review in any given month was associated with a doubling of the probability of receiving a new medication in the following month. Among patients who did not improve by eight weeks of treatment, a psychiatric case review during weeks 8-12 was associated with a higher rate of receipt of new medications during weeks 8-16 or weeks 8-20.
Conclusions: In a collaborative care program, psychiatric case review was associated with higher rates of subsequent receipt of a new depression medication. This finding supports the importance of psychiatric case review in reducing clinical inertia in collaborative care treatment of depression.
Keywords: Collaborative care; Depression; clinical inertia; safety net.