Support and undermining in interpersonal relationships are associated with symptom improvement in a trial of antidepressant medication.

The purpose of this study was to investigate the relationships of chronic stress, social undermining, and social support with symptom reduction and remission in depressed patients treated with antidepressant medication (citalopram), and to determine whether these relationships were moderated by ethnicity. A sample of 301 treatment-seeking adult patients with non-psychotic depression, including 169 African American and 132 Caucasian men and women, were enrolled in an eight week, dose-escalation clinical trial. Intent-to-treat analyses indicated that, consistent with expectations, more baseline social support was associated with greater symptom reduction and higher likelihood of remission, especially at higher levels of social undermining. Additionally, increases in social support from baseline to last visit were associated with more symptom reduction and higher likelihood of remission. However, contrary to expectations, higher levels of baseline social undermining were associated with more symptom reduction in Caucasians, but not in African Americans. Results supported the treatment-enhancing effect of available social support at the beginning of treatment and over the course of treatment. Efforts to enhance social support for patients on antidepressants should be considered as part of comprehensive treatment.

Ethnic differences in antidepressant response: a prospective multi-site clinical trial.

BACKGROUND: Although depression is a highly prevalent condition that occurs in all ethnic groups, the influence of ethnicity on treatment response still remains unclear. METHODS: A prospective 8-week, open-label clinical trial comparing the efficacy and side effects of citalopram (CIT) with dose escalation (20-60 mg/day) was performed in African-Americans and Caucasians with nonpsychotic major depression. The intent-to-treat sample consisted of 301 participants (169 African-Americans and 132 Caucasians). RESULTS: Although African-Americans were more socially disadvantaged and had a more severe depression, outcomes between the groups were similar. Remission rates were approximately 50% in both groups and about 2/3 of participants met response criteria. Retention was greater than 75% in both groups, with no differences in dropout rate. There were no differences in the number of completers, number of visits made, final dose of CIT, or in side effect profiles. CONCLUSIONS: These results confirm the growing body of evidence, including recent studies using measurement-based care, that patients from minority groups have outcomes that are similar to those of Caucasians. The provision of measurement-based care and encouragement of patient participation can reduce ethnic differences in response to treatment for depression.