IL6 and major depressive disorder: The IL-6 levels at the time of AMI were significantly positively correlated with the Hamilton rating scale for depression (HAMD-17) scores 6 months after AMI (IL-6 levels in patients with depression 6 months after AMI: mean = 35.77 pg/mL; SD = ± 79.60; IL-6 levels in patients without depression 6 months after AMI: mean = 18.20 pg/mL; SD = ± 22.80; Pearson correlation coefficient: 0.222; p = 0.023).