Clinical, polysomnographical and metabolical data according to apnoea/hypopnoea index (AHI) categories
| AHI categories | |||||
| <10 | ≥10–<30 | ≥30–<50 | ≥50 | p‐value¶ | |
| Subjects | 90 (18.3) | 140 (28.5) | 79 (16.1) | 182 (37.1) | |
| Age yrs | 49.4±1.3 | 54.5±0.9 | 54.6±1.3 | 58.0±0.8 | <0.0001 |
| BMI kg·m−2 | 27.0±0.4 | 28.5±0.4 | 29.0±0.4 | 31.4±0.3 | <0.0001 |
| TST min | 348±9 | 342±6 | 344±8 | 346±5 | 0.923 |
| AHI n·h−1 | 4.0±0.3 | 19.2±0.5 | 38.9±0.6 | 73.1±1.2 | <0.0001 |
| Arousal index n·h−1 | 15.1±0.7 | 23.9±1.0 | 38.5±2.3 | 61.7±1.3 | <0.0001 |
| Mean Sa,O2# % | 93.4±0.2 | 92.5±0.2 | 92.1±0.4 | 89.3±0.4 | <0.0001 |
| Desaturation index n·h−1 | 4.8±0.7 | 12.9±1.1 | 27.3±2.2 | 60.1±1.7 | <0.0001 |
| Fasting glucose mM | 5.2±0.1 | 5.4±0.1 | 5.4±0.1 | 5.7±1.1 | <0.001 |
| Postload glucose mM | 6.3±0.2 | 7.0±0.3 | 7.0±0.3 | 8.5±0.2 | <0.0001 |
| Fasting insulin mU·L−1 | 11.2±0.8 | 14.2±0.8 | 13.3±0.9 | 16.8±0.9 | <0.0002 |
| Postload insulin mU·L−1 | 56.7±6.4 | 74.3±5.7 | 72.7±6.2 | 102.6±5.7 | <0.0001 |
| Fasting G0/I0 | 0.65±0.04 | 0.51±0.02 | 0.53±0.03 | 0.45±0.02 | <0.0001 |
Data are presented as n (%) or mean±sem unless otherwise stated
BMI: body mass index
TST: total sleep time
Sa,O2: oxygen saturation
G0/I0: ratio of fasting glucose to fasting insulin
#: during sleep
¶: one-way analysis of variance