Values of time and frequency domain indices estimated during the first 15 min (baseline) and last 30 min of the HD session.

Patients are grouped in tertiles of pre-dialysis FO/ECW%.Comparisons between baseline (BL) and last 30 min of hemodialysis (HD)# Wilcoxon signed rank test p-value§ p-value*Kruskal–Wallis one-way analysis of variance p°Kruskal–Wallis one-way analysis of variance pThe bold values mark the indices, which significantly differ among groups.Values of time and frequency domain indices estimated during the first 15 min (baseline) and last 30 min of the HD session.