Female gender (unadjusted rate ratios [RR] = 7.218, 95% CI: 2.247–23.184), low socioeconomic status (RR = 10.051, 95%CI: 1.134–89.128), congenital nephrosis (RR = 6.658, 95% CI: 1.308–33.886), height below 3rd percentile (RR = 5.366, 95% CI: 1.478–19.476), weight below 3rd percentile (RR = 6.408, 95% CI: 1.754–23.413), anuric patients (RR = 6.360, 95% CI: 1.822–22.199), coagulase-negative staph (RR = 3.030, 95% CI: 1.277–7.189), and low albumin level (RR = 5.189, 95% CI: 1.402–19.215), were significantly associated with a high peritonitis rate. This evidence concerns the gene ALB and peritonitis.