According to the linear regression univariate analysis, the ECW/TBW ratio was positively correlated with male sex, age, history of diabetes and CVD events, log-transformed CRP (Log CRP), CTR, and simple PEW score and was negatively correlated with phosphorus level, Alb level, Cre/BSA, and nPCR. The gene discussed is CRP; the disease is diabetes mellitus.