Distribution of cardiovascular autonomic function measures
| Cardiovascular autonomic function | Pooled | Population Study 2018 | Qasigiannguit 2020 | |||
| CARTs | N | 383 | N | 242 | N | 141 |
| Supine-to-upright-position ratio | 377 | 1.1 (1.0–1.2) | 240 | 1.1 (1.0–1.2) | 139 | 1.1 (1.1–1.2) |
| Deep-breathing ratio | 373 | 1.2 (1.1; 1.3) | 238 | 1.2 (1.1; 1.3) | 137 | 1.2 (1.1; 1.3) |
| Valsalva manoeuvre ratio | 310 | 1.4 (1.2; 1.5) | 216 | 1.3 (1.2; 1.5) | 94 | 1.3 (1.2; 1.5) |
| HRV measures | ||||||
| Heart rate (bpm) | 381 | 75.4 (12.3) | 242 | 76.0 (12.5) | 139 | 74.3 (11.9) |
| SDNN (ms) | 378 | 27.8 (20.1; 39.1) | 241 | 26.3 (17.8; 37.2) | 137 | 30.9 (23.5; 41.5] |
| RMSSD (ms) | 378 | 17.4 (11.3; 28.0) | 241 | 15.7 (10.4; 24.4) | 137 | 21.3 (12.8; 33.9) |
| LF power (ms2) | 378 | 65.1 (26.0; 132.3) | 241 | 50.0 (20.9; 119.1) | 137 | 82.6 (37.2; 176.3) |
| HF power (ms2) | 378 | 42.4 (16.8; 109.3) | 241 | 30.1 (13.7; 83.8) | 137 | 69.0 (26.6; 154.2) |
| Total power (ms2) | 378 | 255.0 (125.5; 501.2) | 241 | 211.7 (97.9; 448.0) | 137 | 340.0 (175.0; 607.4) |
Data are given in means (SD), medians (IQR).
CARTs, Cardiovascular autonomic reflex tests; HRV, heart rate variability; LF and HF power, low-frequency power high-frequency power; RMSSD, root mean square of the sum of the squares of differences between consecutive R–R intervals; SDNN, SD of normal-to-normal intervals.