After adjustment for age, sex, Kt/V, IPAQ, CCI, Cr, PTH, and phosphorus, a significantly higher risk of sarcopenia was found in patients in poor-nutrition categories identified by GNRI [odds ratio (OR) = 6.28, 95%CI: 4.05, 9.73) than Cr index (OR = 2.73, 95%CI: 1.71, 4.34) and MIS (OR = 1.91, 95%CI: 1.31, 2.78). This evidence concerns the gene PTH and sarcopenia.