Table 1.
Mean levels and spectral powers of cardiovascular series.
| Day | Night | p Value | |
|---|---|---|---|
| IBI | |||
| mean (ms) | 774.4 (97.3) | 1033.7 (174.1) | <0.01 |
| total power (ms2) | 11,217 (10,569) | 11,751 (7313) | 0.57 |
| VLF power (ms2) | 5885 (5763) | 5905 (3599) | 0.62 |
| LF power (ms2) | 1453 (1219) | 2083 (1946) | 0.25 |
| HF power (ms2) | 538 (576) | 1219 (1036) | <0.01 |
| LF/HF powers ratio | 3.56 (1.4) | 2.21 (1.5) | <0.01 |
| SBP | |||
| mean (mmHg) | 123.7 (12.8) | 108.6 (17.5) | <0.01 |
| total power (mmHg2) | 134.7 (98) | 58.4 (35.4) | <0.01 |
| VLF power (mmHg2) | 65.0 (49.9) | 29.3 (19.4) | <0.01 |
| LF power (mmHg2) | 22.8 (13.4) | 9.7 (6.2) | <0.01 |
| HF power (mmHg2) | 7.3 (4) | 4.0 (2.3) | <0.01 |
| DBP | |||
| mean (mmHg) | 70.2 (8.9) | 60.2 (10.1) | <0.01 |
| total power (mmHg2) | 53.5 (22.6) | 30.4 (17.9) | <0.01 |
| VLF power (mmHg2) | 25.8 (12.7) | 15.3 (9.5) | <0.01 |
| LF power (mmHg2) | 10.3 (4) | 5.6 (3.5) | <0.01 |
| HF power (mmHg2) | 2.8 (1.1) | 1.8 (1.1) | <0.01 |
Values as mean (SD); p value after T test on log-transformed powers.