Table 2.
Univariate Predictors of Sleep Disordered Breathing in the Derivation Dataset (n = 307)
| Characteristic | Non-SDB (n = 158) | SDB (n = 149) | P value |
|---|---|---|---|
| Age, mean (SD) | 49.6 (15.2) | 50.3 (13.6) | 0.666 |
| Men, % | 41.1 | 92.6 | < 0.001 |
| Body mass index (kg/m2), % | < 0.001‡ | ||
| < 21.0 | 22.8 | 2.0 | |
| 21.0-22.9 | 26.0 | 6.1 | |
| 23.0-24.9 | 24.7 | 12.8 | |
| 25.0-26.9 | 12.6 | 18.2 | |
| 27.0-29.9 | 10.8 | 32.4 | |
| ≥ 30.0 | 3.2 | 28.4 | |
| Blood pressure (mm Hg), % | < 0.001‡ | ||
| SBP < 140 and DBP < 90 | 71.5 | 39.9 | |
| 140 ≤ SBP < 160 or 90 ≤ DBP < 100 | 21.5 | 37.2 | |
| 160 ≤ SBP < 180 or 100 ≤ DBP < 110 | 6.3 | 18.2 | |
| SBP ≥ 180 or DBP ≥ 110 | 0.6 | 4.7 | |
| Snoring, % | 65.2 | 96.6 | < 0.001 |
| Current smoker, % | 28.1 | 34.9 | 0.204 |
| Comorbid condition | |||
| Diabetes, % | 5.1 | 4.0 | 0.664 |
| Cerebrovascular disease, % | 4.4 | 2.7 | 0.411 |
| Cardiovascular disease, % | 7.0 | 4.0 | 0.261 |
| Symptom | |||
| Excessive daytime sleepiness (ESS > 11), % | 19.9 | 44.4 | < 0.001 |
| Vitality† (SF-36), mean (SD) | 50.6 (9.5) | 46.2 (10.6) | < 0.001 |
| Mental Health† (SF-36), mean (SD) | 50.9 (9.0) | 48.5 (9.7) | 0.029 |
*SDB = sleep-disordered breathing; SBP = systolic blood pressure; DBP = diastolic blood pressure; ESS = Epworth Sleepiness Scale; SF-36 = Medical outcome study short-form 36-item health survey.
†
Vitality and mental health is the norm score of the SF-36 domain.
‡
P value for trend, χ2 test