Table 2.
MBP and IBI spectral powers and SBP-IBI coherency in control and SAD groups.
| Control | 1-day SAD | 3-day SAD | 7-month SAD | |
|---|---|---|---|---|
| MBP (mmHg2) | ||||
| ULF (0.01–0.05 Hz) | 3.5 (1.9) | 37.2 (2.1)** | 43.6 (1.8)** | 44.3 (1.6)** |
| VLF (0.05–0.25 Hz) | 4.7 (2.0) | 11.0 (2.7)* | 14.2 (1.7)** | 15.3 (2.1)** |
| LF (0.25–0.55 Hz) | 1.7 (2.3) | 1.3 (2.2) | 1.0 (1.5)* | 1.2 (3.1) |
| HF (0.60–2.1 Hz) | 0.5 (2.3) | 4.1 (3.8)** | 1.1 (2.4)* | 0.9 (2.3) |
| IBI (ms 2 ) | ||||
| ULF (0.01–0.05 Hz) | 13.1 (2.0) | 3.6 (2.3)** | 8.5 (2.5) | 42.9 (4.6)** |
| VLF (0.05–0.25 Hz) | 5.0 (2.2) | 1.8 (2.2)** | 4.7 (3.1) | 10.5 (4.4)° |
| LF (0.25–0.55 Hz) | 1.0 (2.2) | 0.5 (2.1)° | 1.0 (2.7) | 2.2 (4.4)* |
| HF (0.60–2.1 Hz) | 2.8 (1.8) | 1.4 (1.5)* | 1.6 (2.2)* | 6.8 (2.8)** |
| SBP-IBI coherency modulus | ||||
| ULF (0.01–0.05 Hz) | 0.52 (0.25) | 0.63 (0.25) | 0.57 (0.29) | 0.59 (0.26) |
| VLF (0.05–0.25 Hz) | 0.56 (0.19) | 0.43 (0.23) | 0.45 (0.17) | 0.30 (0.15)** |
| LF (0.25–0.55 Hz) | 0.46 (0.16) | 0.34 (0.18) | 0.21 (0.07)** | 0.19 (0.10)** |
| HF (0.60–2.1 Hz) | 0.37 (0.16) | 0.54 (0.13)* | 0.31 (0.12) | 0.28 (0.12) |
| SBP-IBI coherency phase (rad) | ||||
| ULF (0.01–0.05 Hz) | −1.87 (0.96) | −2.97 (0.87) | −2.68 (0.89) | −2.49 (0.48)* |
| VLF (0.05–0.25 Hz) | −1.08 (0.59) | −2.60 (1.20)* | −2.63 (0.90)* | — |
| LF (0.25–0.55 Hz) | −0.59 (0.54) | −0.62 (1.61) | — | — |
| HF (0.60–2.1 Hz) | 0.17 (1.27) | 2.98 (1.26)** | — | — |
Spectral powers as geometric mean and geometric SD; coherency phase as circular mean and circular SD; coherency modulus after Fisher’s z transform; the °, * and ** indicate differences vs. controls significant at p < 10%, p < 5% and p < 1% respectively by unpaired t-test after log-transformation of power spectra. Coherency phases estimated only when the coherency modulus is greater than Cth, and compared by Mann Whitney U test.