Learning objectives: After participating in this educational activity, the reader should be better able to measure the risk of depression before and after coronary artery bypass graft (CABG) surgery; examine the course of depression after CABG; and apply the results of the study to the treatment of patients.
Objective: Depression is highly comorbid with coronary artery disease. Clinicians face the question of whether patients' depressive symptoms will improve after coronary artery bypass graft surgery (CABG). The objective of this meta-analysis is to determine the course of depressive symptoms after CABG.
Methods: EMBASE, PubMed, and PsycINFO were searched for studies assessing depression before and after CABG. Meta-analyses were performed for depression at early (1-2 weeks), recovery (>2 weeks to 2 months), mid (>2 months to 6 months), and late (>6 months) postoperative time points. Heterogeneity and publication bias were analyzed.
Results: Thirty-nine studies were included in the meta-analysis. Twelve reported dichotomous outcomes; 18 reported continuous outcomes; and 9 reported both. Risk of depression was increased early (relative risk [RR] = 1.27; 95% confidence interval [CI], 1.01-1.61). There was a significantly decreased risk of depression at recovery (RR = 0.78; 95% CI, 0.67-0.90), mid (RR = 0.64; 95% CI, 0.58-0.70), and late (RR = 0.68; 95% CI, 0.58-0.79) time points without heterogeneity. All studies reporting continuous depression scales had significant heterogeneity.
Conclusions: The risk of depression decreased post-CABG when depression was measured dichotomously. While depression improves overall and remits for some patients after CABG, the majority of patients will not experience remission of depression. Preoperative and postoperative depression monitoring is important.