Table 1.
Baseline Characteristics
| Characteristic | Patients With OSA (n = 100) | Healthy Control Subjects (n = 50) | P Value |
|---|---|---|---|
| Age, y | 52 (10) | 52 (11) | .83 |
| Male (female) | 87 (13) | 42 (8) | .41 |
| BMI, kg/m2 | 34.5 (6.4) | 24.3 (2.7) | < .001 |
| FEV1, % predicted | 93 (2) | 101 (13) | < .001 |
| FVC, % predicted | 94 (11) | 104 (13) | < .001 |
| FEV1/FVC | 80 (5) | 79 (6) | .22 |
| PaO 2, kPa | 11.6 (1.3) | 12.3 (1.4) | .004 |
| PaCO 2, kPa | 5.3 (0.5) | 5.6 (0.5) | .01 |
| Epworth Sleepiness Score | 9 (5) | 5 (4) | < .001 |
| HIT6 headache score | 45 (9) | 42 (7) | .02 |
| SF-36v2: physical component | 47 (11) | 57 (5) | < .001 |
| SF-36v2: mental component | 48 (10) | 53 (8) | < .001 |
| AHI, events/h | 53.9 (17.8) | 2.0 (1.9) | … |
| ODI, events/h | 49.5 (21.0) | 1.9 (1.8) | … |
Values are expressed as mean (SD) except as otherwise noted. AHI = apnea-hypopnea index; HIT6 = Headache Impact Test-6; ODI = oxygen-desaturation index; OSA = obstructive sleep apnea; SF-36v2 = Short Form-36 General Health Survey version 2.