Variable | N | Mean (± SD) | Min. | 25% | Median | 75% | Max. | IQR | Spearman correlation coefficienta | ||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
5 minutes spontaneous breathing in supine position | |||||||||||||
 |  |  |  |  |  |  |  |  | HR | HF power | HFn | LF power | LFn |
HR [beats/min] | 625 | 64.7 (± 9.9) | 46.6 | 56.9 | 63.1 | 70.1 | 103.5 | 13.2 | 1 |  |  |  |  |
HF power [ms2] | 625 | 669.9 (± 3348.4) | 3.6 | 16.4 | 40.4 | 202.4 | 70263 | 185.9 | -0.4 | 1 |  |  |  |
HFn [n.u.] | 625 | 0.2 (± 0.2) | 0.0 | 0.1 | 0.2 | 0.3 | 0.9 | 0.3 | -0.1 | 0.5 | 1 |  |  |
LF power [ms2] | 625 | 519.2 (± 1378.3) | 3.3 | 63.4 | 145.5 | 357.8 | 21807.3 | 294.4 | -0.4 | 0.7 | 0.1 | 1 |  |
LFn [n.u.] | 625 | 0.4 (± 0.2) | 0.0 | 0.2 | 0.4 | 0.6 | 1.0 | 0.3 | -0.2 | -0.1 | 0.30 | 0.3 | 1 |
RMSSD [ms] | 625 | 40.8 (± 52.9) | 4.5 | 14.7 | 22.3 | 40.7 | 462.4 | 26.0 | -0.4 | 0.7 | 0.4 | 0.6 | 0.0 |
24-hour recordings | |||||||||||||
 |  |  |  |  |  |  |  |  | HR | SDNN | RMSSD | pNN50 |  |
HR [beats/min] | 254 | 69.3 (± 9.0) | 50.4 | 62.7 | 69.0 | 74.7 | 94.2 | 12.0 | 1 |  |  |  |  |
SDNN [ms] | 254 | 124.9 (± 33.6) | 59.8 | 101.3 | 122.6 | 147.0 | 222.7 | 45.7 | -0.4 | 1 |  |  |  |
RMSSD [ms] | 254 | 42.9 (± 34.9) | 9.9 | 22.2 | 31.3 | 49.8 | 292.1 | 27.6 | -0.5 | 0.4 | 1 |  |  |
pNN50 [%] | 254 | 2.8 (± 3.9) | 0.0 | 0.0 | 1.0 | 4.0 | 18.0 | 4.0 | -0.5 | 0.6 | 0.8 | 1 |  |
DC [ms] | 254 | 5.6 (± 2.6) | 0.3 | 3.8 | 5.3 | 7 | 21.1 | 3.2 | -0.7 | 0.4 | 0.4 | 0.3 |  |