ALB and major depressive disorder: While inflammation level was correlated with depression (r = 0.133), age (r = 0.256), etiology of ESRD (r = 0.125), combined hypertension (r = 0.143), phosphorus (r = 0.134), iPTH (r = 0.113) and triglyceride (r = 0.156), but negatively correlated with albumin (r = -0.138) (all p < 0.05, Table 3).