After adjusting for age, gender, Charlson comorbidity index, PD vintage, Alb, Hb, Hs-CRP, and neutrophil/lymphocyte ratio, AID (adjusted OR = 1.45, 95% CI: 1.06–2.00, p = 0.02, Table 2) was independently positively associated with the occurrence of peritonitis. This evidence concerns the gene GSTM1 and peritonitis.