Table 3.
Logistic regression results for prediction of morning headaches in the studied sample.
| OR | OR 95% CI | Wald | p | ||
|---|---|---|---|---|---|
| Female sex | 1.375 | 1.080 | 1.751 | 6.694 | 0.010 |
| Hypertension | 1.246 | 1.064 | 1.461 | 7.417 | 0.006 |
| Smoking | 0.951 | 0.822 | 1.100 | 0.453 | 0.501 |
| Snoring | 0.866 | 0.729 | 1.028 | 2.694 | 0.101 |
| Observed apneas | 1.077 | 0.912 | 1.271 | 0.758 | 0.384 |
| Sleepiness | 0.937 | 0.800 | 1.097 | 0.654 | 0.419 |
| Unrefreshing sleep | 1.424 | 1.192 | 1.700 | 15.231 | 0.000 |
| Choking at night | 1.253 | 1.051 | 1.495 | 6.313 | 0.012 |
| Age | 0.987 | 0.974 | 1.001 | 3.322 | 0.068 |
| BMI | 1.017 | 0.978 | 1.057 | 0.689 | 0.406 |
| Neck circumference | 1.002 | 0.939 | 1.070 | 0.005 | 0.943 |
| TST | 0.872 | 0.763 | 0.998 | 3.952 | 0.047 |
| Arousal index | 0.997 | 0.984 | 1.009 | 0.292 | 0.589 |
| AHI | 0.990 | 0.979 | 1.000 | 3.675 | 0.055 |
| Basal SpO2 | 0.947 | 0.894 | 1.004 | 3.373 | 0.066 |
| Mean SpO2 of desaturations | 1.013 | 0.985 | 1.041 | 0.809 | 0.368 |
| SpO2 nadir | 0.988 | 0.966 | 1.010 | 1.148 | 0.284 |
| % time below 90% | 0.619 | 0.209 | 1.832 | 0.751 | 0.386 |
| Epworth sleepiness scale score | 1.012 | 0.978 | 1.047 | 0.484 | 0.487 |
OR—odds ratio, 95% CI—95% confidence interval for odds ratio; Wald—Wald statistics for a single parameter in the model, p—probability in the Wald’s statistical test, BMI—body mass index, TST—total sleep time, AHI—apnea–hypopnea index, SpO2—blood oxygen saturation.