CRP and diabetes mellitus: We included all the variables with a p-value less than 0.05 into the multivariate logistic regression model (including monthly frequency of HD, sex, diabetes, BUN, Scr, TG, LDL-c, HDL-c, phosphorous, iron, PTH, vitamin D, NT-proBNP, hemoglobin, CRP, Kt/V urea, and ferritin).