Table 2. Values of time and frequency domain indices estimated during the first 15 min (baseline) and last 30 min of the HD session.
| 1st FO/ECW% tertile | 2nd FO/ECW% tertile | 3rd FO/ECW% tertile | |||||||
|---|---|---|---|---|---|---|---|---|---|
| BL | last 30'HD | Δ = BL-last30'HD | BL | last 30'HD | Δ = BL-last30'HD | BL | last 30'HD | Δ = BL-last30'HD | |
| meanHR (bpm) | 66.2 (60.7, 74.7) | 72.3 (60.4, 79.7) | 2.1(−2.0,8.6) | 69.0 (58.6, 78.9) | 68.0 (61.3, 77.8) | 2.1(−3.4,6.9) | 67.6 (61.4, 73.4) | 67.1 (61.1, 79.2) | 0.5(−2.2,5.1) |
| SDNN (ms) | 40.6 (30.6, 53.0) | 43.5 (37.2, 71.7) | 9.4(−3.3,21.4) | 31.1 (25.9, 54.4) | 58.6 (31.8, 80.6) | 18.6(0.8,34.8) | 25.9 (20.8, 46.4) | 39.8 (24.1, 62.2) | 5.0(−5.3,21.8) |
| SDANN (ms) | 21.5 (6.1, 34.6) | 16.7 (13.9, 27.5) | −2.3(−9.5,10.6) | 12.6 (5.0, 21.2) | 14.5 (13.1, 50.8) | 4.2(−2.3,17.8) | 8.6 (6.1, 11.7) | 9.7 (6.7, 13.7)*° | 1.6(−3.0,3.6) |
| RMSSD (ms) | 895 (516, 1216) | 871 (572, 1684) | 90.0(−43.9,447.7) | 1033 (505, 1567) | 922 (561, 1513) | 78.0(−388.0,380.7) | 1143 (577, 1585) | 759 (486, 1344) | 50.4(−633.5,365.8) |
| pNN50% | 1.02 (0.22, 3.64) | 0.76 (0.33, 9.44) | 0.04(−1.14,0.55) | 0.90 (0.23, 6.36) | 3.37 (0.63, 16.50) | 0.41(−1.29,5.31) | 1.02 (0.21, 4.45) | 0.82 (0.09, 15.08) | 0.02(−0.85,1.36) |
| VLF (ms 2) | 454 (317, 797) | 560 (362, 2157) | 227 (37,1308)# | 280 (127, 471)* | 653 (269, 2042) | 278 (37, 1203)§ | 233 (86, 376)* | 320 (87, 721) | 45 (−235, 317) |
| LF (ms 2) | 72.7 (44.7, 348.8) | 109.1 (43.8, 498.1) | 20.4 (2.3,184.1)# | 69.8 (30.1, 131.1) | 205.5 (94.5, 653.5) | 85.4 (0.8, 237.8)# | 45.2 (18.1, 118.0) | 42.6 (19.1, 303.9) | 4.5 (−11.7, 101.9) |
| HF (ms 2) | 46.6 (30.6, 169.1) | 36.0 (9.0, 121.0) | −6.2 (−81.3,5.6) | 39.3 (16.6, 55.1) | 65.0 (31.6, 139.3) | 10.7 (−3.5, 60.0)# | 44.9 (21.4, 102.4) | 45.8 (12.6, 126.3) | −2.8 (−36.0, 14.8) |
| LF% | 32.9 (23.3, 41.0) | 39.0 (26.6, 50.7) | 6.8 (−0.7,14.7) | 33.3 (16.3, 42.8) | 41.6 (24.4, 51.1) | 6.8 (−7.9, 16.1) | 30.3 (18.8, 40.5) | 25.6 (11.0, 47.2) | 3.2 (−13.1,14.4) |
| HF% | 19.0 (7.3, 27.5) | 11.0 (5.4, 16.1) | −4.9 (−14.3,−2.7)§ | 14.9 (8.7, 29.6) | 17.3 (6.4, 23.9) | 3.4 (−6.0, 8.0) | 35.2 (13.4, 45.3) | 23.6 (6.4, 31.0) | −6.4 (−20.7,1.1) |
| LF/HF | 1.67 (1.01, 3.03) | 2.64 (1.74, 7.17) | 0.99 (0.80,2.72)§ | 1.77 (0.76, 3.20) | 2.81 (1.35, 6.05) | 0.17 (−0.57, 3.28) | 0.95 (0.57, 1.99) | 1.68 (0.81, 2.42)* | 0.26 (−0.23,1.31) |
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< 0.05, or
§ p-value<0.01 (italics)
*Kruskal–Wallis one-way analysis of variance p<0.05, post hoc comparison p-value <0.05 vs 1st tertile
°Kruskal–Wallis one-way analysis of variance p<0.05, post hoc comparison p-value <0.05 vs 2nd tertile
The bold values mark the indices, which significantly differ among groups.