Table 1: Demographic data and laboratory parameters of the OSA and healthy subjects.
| Variables | OSA group (n = 58) | Healthy subjects (n = 35) | p-value |
| Gender, n (%) | |||
| Female | 22 (37.9) | 15 (42.9) | 0.667 |
| Male | 36 (62.1) | 20 (57.1) | |
| Age (y) | 50.94 ± 10.54 | 50.08 ± 10.99 | 0.711 |
| BMI (kg/m2) | 31.19 ± 4.98 | 29.80 ± 2.01 | 0.12 |
| Copeptin (ng/mL) | 8.74 ± 6.27 | 4.17 ± 3.57 | 0.001 |
| Smoking status, n (%) | |||
| Smoker | 13 (22.4) | 6 (18.8) | 0.138 |
| Non-smoker | 33 (56.9) | 24 (75) | |
| Ex-smoker | 12 (20.7) | 5 (6.2) |
OSA: Obstructive Sleep Apnea; BMI: Body Mass Index; A p-value < 0.05 was taken to indicate significance.