The demographic and biochemical characteristics of the study population were summarized and compared using the
complex samples general
linear model for continuous variables and
the complex samples chi-square test for categorical variables.
The mean and the 95% confidence interval (CI) were presented for data on continuous variables,
whereas unweighted count with weighted percentage was presented for data on categorical variables.
The complex samples chi-square test was used to analyze prevalence of CKD by GFR with ACR categories, and GFR comparison between MDRD and CKD-EPI equations was expressed as a weighted percentage