In multivariate analysis, there was significantly different effect of an interaction among gender and BMI on patient survival in the group of BMI over 25.1 kg/m2 (quintile 5) (p = 0.030) after adjusted with age, dialysis duration, congestive heart failure, coronary artery disease, peripheral vascular disease, diabetes mellitus, chronic lung disease, moderate to severe liver disease, smoking, albumin, CRP, serum creatinine, total cholesterol, triglyceride, low-density lipoprotein (S2 Table). Here, CRP is linked to chronic lung disease.