In this study, 232 consecutive patients undergoing elective CABG were evaluated for depression utilizing the 9-item Patient Health Questionnaire scale at least 3 days before surgery and 6 months after CABG. In addition, peripheral blood samples were collected at baseline and the circulation levels of hsCRP were measured.
The preoperative and postoperative rate of depression was 18.1 % . Interestingly, preoperative depression was independently associated with women (odds ratio [OR], 2.49; 95 % confidence interval [CI], 1.13-5.50) and log-transformed hsCRP (OR, 1.16; 95 % CI, 1.06-1.27) after adjusting for various factors using logistic regression, including age, sex, and university-level education. Postoperative depression was only associated with log-transformed hsCRP (OR, 1.15; 95 % CI, 1.05-1.25) in these patients. Log-transformed hsCRP remained associated with future depression after adjusting for postoperative medications or major adverse cardiovascular events during the follow-up period.
The present study is the first to report elevated serum hsCRP is an independent predictor for depression in CABG patients not only preoperatively but also up to 6 months after surgery. These clinical findings may reveal a potential target for improving prognosis in CABG patients with depression.