Table 3.
Systolic blood pressure variability at baseline and during LBNP −20 mmHg: median (confidence interval)
| Baseline | LBNP | Δ (LBNP baseline) | ||||||
|---|---|---|---|---|---|---|---|---|
| Control (n = 56) | CFS (n = 14) | p value* | Control (n = 56) | CFS (n = 14) | Control (n = 56) | CFS (n = 14) | p value* | |
| Variance (mmHg2) | 37.2 (32.3–43.7) | 41.7 (25.1–63.4) | 0.509 | 35.0 (27.8–40.7) | 38.0 (33.9–47.6) | −1.2 (−6.1 to 3.2) | 1.5 (−12.3 to 10.3) | 0.883 |
| Total Power (mmHg2) | 48.4 (41.5–60.8) | 51.1 (41.5–81.6) | 0.472 | 40.2 (34.3–43.3) | 43.0 (32.2–54.2) | −2.4 (−18.1 to 1.2) | −10.2 (−46.2 to 6.1) | 0.481 |
| HF absolute units (mmHg2) | 1.03 (0.89–1.25) | 0.71 (0.33–1.22) | 0.012 | 0.92 (0.77–1.19) | 0.68 (0.43–0.93) | −0.14 (−0.27 to –0.02) | 0.02 (−0.40 to 0.32) | 0.780 |
| LF absolute units (mmHg2) | 5.76 (4.44–6.95) | 2.96 (1.87–8.58) | 0.223 | 6.00 (5.11–8.74) | 6.66 (3.98–11.52) | −0.04 (−1.73 to 1.83) | 2.97 (−0.56 to 4.48) | 0.186 |
| HF normalized units (nu) | 0.19 (0.15–0.25) | 0.13 (0.07–0.49) | 0.325 | 0.14 (0.10–0.21) | 0.09 (0.08–0.14) | −0.03 (−0.07 to 0.03) | −0.03 (−0.09 to 0.02) | 0.370 |
| LF normalized units (nu) | 0.81 (0.75–0.85) | 0.87 (0.51–0.93) | 0.325 | 0.86 (0.79–0.90) | 0.91 (0.86–0.92) | 0.03 (−0.03 to 0.07) | 0.03 (−0.02 to 0.09) | 0.370 |
| LF/HF | 6.24 (4.37–8.23) | 8.23 (1.34–15.38) | 0.528 | 7.64 (4.61–10.33) | 12.21 (7.84–20.40) | −0.03 (−1.42 to 3.24) | 2.52 (−1.53 to 8.68) | 0.386 |
* Wilcoxon–Mann–Whitney’s test. In order to reduce the methodological problem of multiple comparisons, statistical tests were only performed for the cardiovascular variable baseline and Δ (LBNP baseline). Bold types indicate a statistical significant difference between control subjects and CFS patients