Fig. 2.

Single-strand breaks of DNA (presented as tail moment) in white blood cells of healthy subjects and chronic kidney disease patients on hemodialysis supplied with placebo (white columns) and selenium (dark columns; the values of both subgroups were taken together) at the beginning of the study (HD 0) and after 1 (HD 1) and 3 months (HD 3). Statistics: a, HD 0 both subgroups vs. controls, P < 0.01; b, HD 1 + Se vs. HD 0 + Se, P < 0.02; c, HD 3 + Se vs. HD 0 + Se, P < 0.01