Baseline | Delta tilt (response to 20° HUT) | Delta imagination (response to imagery upright position) | |||||||
---|---|---|---|---|---|---|---|---|---|
CFS patients | Healthy controls | p-value | CFS patients | Healthy controls | p-value | CFS patients | Healthy controls | p-value | |
Heart rate – beats/min, mean (SD) | 81 (13) | 71 (9.9) | 0.001 | 4.5 (4.2) | 3.2 (3.4) | 0.192 | 1.8 (2.2) | 1.4 (2.3) | 0.470 |
Systolic blood pressure – mm Hg, mean (SD) | 111 (10) | 109 (9.8) | 0.260 | -0.18 (2.9) | 0.17 (4.6) | 0.701 | 0.37 (2.6) | 0.24 (1.9) | 0.819 |
Diastolic blood pressure – mm Hg, mean (SD) | 69 (7.6) | 64 (7.2) | 0.017 | 1.5 (2.4) | 1.8 (4.2) | 0.783 | 0.25 (1.6) | 0.31 (1.8) | 0.886 |
Mean arterial blood pressure – mm Hg, mean (SD) | 84 (8.1) | 79 (7.4) | 0.025 | 0.85 (2.6) | 1.4 (3.9) | 0.466 | 0.26 (1.8) | 0.42 (2.0) | 0.727 |
Stroke index – ml/m2, mean (SD) | 47 (8.8) | 51 (5.9) | 0.049 | -4.8 (4.1) | -4.5 (3.7) | 0.690 | -0.59 (1.6) | -0.07 (1.3) | 0.162 |
Cardiac index – l/min/m2, mean (SD) | 3.8 (0.59) | 3.6 (0.48) | 0.208 | -0.17 (0.24) | -0.14 (0.23) | 0.675 | 0.03 (0.13) | 0.06 (0.10) | 0.340 |
Total peripheral resistance index – mm Hg/l/min/m2, mean (SD) | 7.9 (1.6) | 8.6 (1.9) | 0.099 | 0.55 (0.78) | 0.67 (1.0) | 0.587 | -0.06 (0.37) | -0.14 (0.39) | 0.397 |
LFnorm – nu, mean (SD) | 51 (19) | 51 (15) | 0.953 | 8.3 (9.8) | 6.7 (12) | 0.560 | 0.64 (4.7) | -1.4 (3.3) | 0.042 |
HFnorm – nu, mean (SD) | 49 (19) | 49 (15) | 0.953 | -8.2 (9.7) | -6.8 (12) | 0.579 | -0.64 (4.7) | 1.4 (3.3) | 0.042 |
LFabs – ms2, median (IQR) | 457 (411) | 884 (770) | 0.001 | -36 (409) | -92 (675) | 0.753 | 1.9 (66) | -34 (99) | 0.026 |
HFabs – ms2, median (IQR) | 440 (659) | 766 (967) | 0.012 | -266 (888) | -370 (1019) | 0.952 | -0.9 (64) | -18 (91) | 0.628 |
LF/HF – median (IQR) | 0.97 (1.8) | 1.1 (0.93) | 0.942 | 0.16 (0.60) | 0.20 (0.55) | 0.818 | 0.004 (0.19) | -0.07 (0.14) | 0.025 |
Total power - ms2, median (IQR) | 1092 (1415) | 2172 (2260) | 0.001 | -296 (1014) | -320 (2278) | 0.952 | -28 (131) | -64 (207) | 0.107 |