Table 1. Baseline differences between males and females.
| Variable | Male (n = 1,975) | Female (n = 378) | p |
| Age | 41 (34, 50) | 54 (44, 59) | <0.001 |
| BMI (kg/m2) | 26.97 (24.98, 29.32) | 25.97 (23.43, 28.36) | <0.001 |
| WHR | 0.96 (0.93, 0.99) | 0.92 (0.88, 0.95) | <0.001 |
| Smoker, N (%) | 968 (49.0) | 14 (3.7) | <0.001 |
| Drinker, N (%) | 592 (29.97) | 26 (6.88) | <0.001 |
| Presence of hypertension, N (%) | 489 (24.8) | 90 (23.8) | 0.561 |
| Presence of diabetes, N (%) | 135 (6.8) | 28 (7.4) | 0.659 |
| ESS | 9 (6, 14) | 8 (3, 12) | <0.001 |
| AHI | 42.41 (19.46, 62.78) | 23.40 (11.40, 46.55) | <0.001 |
Skewed data are presented as the medians (interquartile ranges), and categorical data are presented as the numbers (percentages). All ages age shown in years. Differences between males and females were examined by the Mann-Whitney U test or Chi squared test.
Abbreviations: BMI, Body mass index; WHR, waist circumference/hip circumference ratio; ESS, Epworth sleepiness score; AHI, apnea-hypopnea index.