Fig 2. Distribution of number of chronic dialysis centers included in the sample, total number of dialysis centers, and number of patients participating in the survey in Brazil, by region, 2012.

Number of dialysis centers (DC) selected (n^c) and total number of dialysis centers in Brazil and per region (N^c—in parenthesis); n^p: sample population—children and adolescents who were on chronic dialysis program.