Are patient characteristics associated with quality of depression care and outcomes in collaborative care programs for depression?

Abstract 

Objective

To determine whether demographic or clinical characteristics of primary care patients are associated with depression treatment quality and outcomes within a collaborative care model.

Methods

Collaborative depression care, based on principles from the Improving Mood-Promoting Access to Collaborative Treatment (IMPACT) trial, was implemented in six community health organizations serving disadvantaged patients. Over 3 years, 2821 patients were treated. Outcomes were receipt of quality treatment and depression improvement.

Results

Logistic regression analyses revealed that patients who were older, more depressed or more anxious were more likely to be retained in treatment and to receive appropriate pharmacotherapy. Whereas gender and depression severity were unrelated to depression outcomes, significantly more patients who preferred Spanish (59.1%) than English (48.5%, P<.01) improved within 12 weeks in multivariate analyses. High baseline anxiety was associated with a lower probability of improvement, and older age showed a similar trend. Survival analyses demonstrated that patients who preferred Spanish or were less anxious improved significantly more rapidly than their counterparts (P<.001).

Conclusions

Patients with more anxiety received higher quality care but experienced worse depression outcomes than less anxious patients. Spanish language preference was strongly associated with depression improvement. This collaborative care program attained admirable outcomes among disadvantaged Spanish-speaking patients without extensive cultural tailoring of care.

Keywords: Depression, Anxiety, Disease management, Primary health care, Healthcare disparities

• 1 Recent epidemiologic studies have found that most patients with mental illness are seen exclusively in primary care medicine. These patients often present with medically unexplained somatic symptoms and utilize at least twice as many health care visits as controls. There has been an exponential growth in studies in this interface between primary care and psychiatry in the last 10 years. This special section, edited by Jürgen Unutzer, M.D., will publish informative research articles that address primary care-psychiatric issues.