Table 1.
Patients characteristics. Data are expressed as mean ± standard deviation.
| Mean ± Sd (n = 37) |
≥15 AHI < 30 Events/h, (n = 12) | AHΙ ≥ 30 Events/h, (n = 25) |
p Value | |
|---|---|---|---|---|
| Age, years | 47.7 ± 9.6 | 50.7 ± 7.2 | 46.3 ± 10.4 | 0.194 |
| Gender, n = M/F | 31/6 | 9/3 | 22/3 | - |
| AHI, events/h−1 | 48.0 ± 25.3 | 22.1 ± 5.4 | 60.4 ± 21.2 | <0.001 |
| Apnea, events/h−1 | 17.6 ± 20.0 | 3.1 ± 3.2 | 24.6 ± 21.0 | 0.001 |
| Hypopnea, events/h−1 | 29.0 ± 14.0 | 19.0 ± 5.1 | 33.8 ± 14.4 | 0.002 |
| Stage 1, % | 4.0 ± 4.0 | 2.7 ± 0.8 | 4.7 ± 4.8 | 0.172 |
| Stage 2, % | 53.9 ± 15.0 | 51.8 ± 12.0 | 54.9 ± 16.3 | 0.569 |
| Stage 3–4, % | 11.0 ± 6.5 | 13.7 ± 6.7 | 9.7 ± 6.2 | 0.078 |
| REM, % | 9.7 ± 5.5 | 9.6 ± 5.1 | 9.8 ± 5.8 | 0.923 |
| Desaturation Index, % | 51.0 ± 28.8 | 22.7 ± 9.0 | 64.6 ± 24.7 | <0.001 |
| Mininum SaO2, % ‡ | 75.6 ± 12.9 | 82.7 ± 7.4 | 72.3 ± 13.8 | 0.020 |
| Average SaO2, % ‡ | 87.6 ± 5.2 | 90.6 ± 1.7 | 86.1 ± 5.7 | 0.013 |
| Duration SaO2 < 90%, min ‡ | 40.9 ± 51.1 | 8.8 ± 13.5 | 56.3 ± 55.5 | 0.006 |
| Body Mass Index, kg/m2 | 33.1 ± 6.8 | 32.5 ± 4.0 | 33.3 ± 7.9 | 0.749 |
| Body fat, % | 32.9 ± 9.1 | 35.2 ± 9.3 | 31.8 ± 9.1 | 0.303 |
| Visceral fat, score | 14.3 ± 5.7 | 14.3 ± 4.0 | 14.3 ± 6.4 | 0.979 |
| Muscle mass, kg | 34.4 ± 12.2 | 34.6 ± 13.6 | 34.2 ± 11.7 | 0.929 |
| Body Surface Area, m2 | 2.4 ± 0.5 | 2.4 ± 0.3 | 2.4 ± 0.6 | 0.547 |
| Lean Body Mass, % | 78.6 ± 6.7 | 77.3 ± 5.6 | 79.3 ± 7.2 | 0.415 |
| Total Body Water, % | 49.5 ± 4.9 | 48.4 ± 4.3 | 50.0 ± 5.2 | 0.349 |
| RMR, kcal/day | 1932.2 ± 269.5 | 1879.0 ± 226.1 | 1957.8 ± 288.8 | 0.413 |
| Neck circumference, cm | 41.3 ± 4.1 | 40.3 ± 3.8 | 41.7 ± 4.3 | 0.340 |
| WHR | 0.9 ± 0.8 | 1.0 ± 0.1 | 0.9 ± 0.1 | 0.125 |
| Δchest, % | 5.6 ± 2.1 | 5.5 ± 2.3 | 5.9 ± 1.6 | 0.628 |
| FEV1, % of predicted | 94.9 ± 12.4 | 99.6 ± 6.1 | 92.7 ± 14.0 | 0.116 |
| FVC, % of predicted | 95.8 ± 10.6 | 100.3 ± 5.5 | 93.7 ± 11.8 | 0.077 |
| PSQI, score | 7.5 ± 5.2 | 8.9 ± 6.0 | 6.8 ± 4.7 | 0.268 |
| ESS, score | 7.7 ± 4.5 | 6.7 ± 2.5 | 8.1 ± 5.1 | 0.375 |
Abbreviations: AHI: Apnea–Hypopnea Index; ESS: Epworth Sleepiness Scale; F: Female; FEV1: forced expiratory volume in 1st sec; FVC: forced vital capacity; M: Male; PSQI: Pittsburg Sleep Quality Index; REM: Rapid Eye Movement; RMR: resting metabolic rate; WHR: Waist-hip ratio; Δchest: chest circumference difference between maximal inhalation and exhalation. ‡ Minimum, Average and Duration of SaO2 < 90% are polysomnography derived parameters.