Anthropometric data and respiratory and polysomnographic characteristics of patients according to the presence or absence of OSAS
| Group 1: AHI ⩾15(n = 143) | Two tailed p value | Group 2: AHI <15(n = 95) | |
|---|---|---|---|
| Values are median (range). | |||
| BMI, body mass index; AHI, apnoea-hypopnoea index; FEV1, forced expiratory volume in 1 second; FVC, forced vital capacity; VC, vital capacity; FRC, functional residual capacity; FEF25–75, forced mid expiratory flow; EFL, expiratory flow limitation. | |||
| Age (years) | 55.3 (26–79) | <0.0001 | 49.0 (27–76) |
| BMI (kg/m2) | 33.9 (20–65) | 0.0059 | 31.7 (21–56) |
| Smoking (pack years) | 17.0 (0–40) | NS | 17.5 (0–39) |
| Neck circumference (cm) | 44.5 (35–54) | <0.0001 | 42.0 (34–53) |
| AHI (events/hour) | 40.6 (15–139) | <0.0001 | 4.0 (0–14.9) |
| FEV1/FVC (% pred) | 98.0 (80–123) | NS | 99.0 (81–116) |
| FEV1 (% pred) | 93.1 (61–141) | NS | 98.0 (69–132) |
| VC (% pred) | 97.2 (62–142) | NS | 101.5 (61–144) |
| FRC (% pred) | 92.0 (50–139) | NS | 94.0 (64–135) |
| FEF25–75 (% pred) | 79.0 (38–146) | 0.0118 | 88.0 (52–138) |
| EFL seated (%) | 0 (0–81) | 0.0020 | 0 (0–84) |
| EFL supine (%) | 45.0 (0–87) | <0.0001 | 17.0 (0–80) |