After adjusting for confounders (age, sex, diabetes, systolic pressure, diastolic pressure, hemoglobin, albumin, C-reactive protein, low-density lipoprotein, peritonitis rate, eGFR at baseline, weekly KT/V, PD modality, and use of vitamin D), the adjusted HR of all-cause mortality was 2.74 (95% CI, 1.27–5.90) in patients with lower fT4 levels (P = 0.01). The gene discussed is CRP; the disease is diabetes mellitus.