ALB and peritonitis: The result by using independent variables as continuous data showed that factors associated with risk for the first episode of peritonitis were advanced age (HR = 1.016, 95% CI = 1.007 to 1.024, P = 0.000), male (HR = 1.376, 95% CI = 1.079 to 1.756, P = 0.010) and lower albumin level (HR = 0.961, 95% CI = 0.937 to 0.985, P = 0.002), which was similar with the results analyzed with categorical data.