Baseline clinical and biochemical characteristics of prevalent hemodialysis patients by categories of plasma concentrations of 7S domain of collagen type IV (P4NP_7S).^a

aContinuous variables are given as medians and interquartile range. Between categories, comparisons were made using non-parametric Kruskal-Wallis test for continuous variables and using Chi square test for categorical variables. bBody mass index was calculated as weight in kilograms divided by height in meters squared.