Statistical analysis
Statistical analysis was performed using SPSS for Windows
software, version 12.0 (SPSS Inc., Chicago, IL, USA). All
data were expressed as meanSD. To compare the
difference between peritonitis group and peritonitis-free
group, Student’s t-test was used for continuous variables
and chi-square test was used for categorical variables. To
determine risk factors for peritonitis, multivariate Cox
regression was performed. Kaplan–Meier analysis and logrank
test were used to examine the difference of peritonitisfree
period according to the presence of diabetes and RRF.
Data were defined as censored if death and transfer to
haemodialysis or renal allograft occurred. All probabilities
were two-tailed and the level of significance was set at 0.05.