Table 1.
Summary of the clinical and sleep study variables.
| MH ≥ 1 per Week | ||||||
|---|---|---|---|---|---|---|
| No MH (n = 711) | MH (n = 298) | |||||
| M | SD | M | SD | F | p | |
| age | 52.00 | 12.09 | 52.11 | 11.31 | 0.02 | 0.90 |
| BMI | 31.92 | 5.83 | 32.55 | 6.58 | 2.06 | 0.15 |
| Neck circumference | 41.92 | 4.12 | 41.45 | 4.54 | 2.61 | 0.11 |
| TST | 5.85 | 1.09 | 5.71 | 1.09 | 3.47 | 0.06 |
| Arousal index | 23.11 | 17.88 | 20.13 | 16.42 | 6.57 * | 0.01 |
| AHI | 28.46 | 26.94 | 23.66 | 25.78 | 7.11 * | 0.01 |
| Basal SpO2 | 92.21 | 3.52 | 92.04 | 3.60 | 0.50 | 0.48 |
| Mean SpO2 of desaturations | 86.87 | 7.53 | 87.13 | 7.35 | 0.25 | 0.61 |
| SpO2 nadir | 77.79 | 10.51 | 78.17 | 11.37 | 0.27 | 0.60 |
| % of time below 90% | 19.00 | 23.00 | 17.00 | 22.00 | 2.31 | 0.13 |
| Epworth sleepiness scale | 8.39 | 4.47 | 8.49 | 4.22 | 0.11 | 0.74 |
F—statistics in the analysis of variance or Welch’s test depending on Levene’s test result, p—probability in the statistical test, *—the criterion of homogeneity of variance was not fulfilled, Welch’s test was used in those cases, MH—morning headache, M—mean value, SD—standard deviation, BMI—body mass index, TST—total sleep time, AHI—apnea–hypopnea index, SpO2—blood oxygen saturation.