Patient co-morbidities stratified by OSA severity (n = 2149)
| Co-morbidity | No OSA(n = 432) | Mild OSA(n = 738) | Moderate OSA(n = 443) | Severe OSA(n = 536) | All(n = 2149) | p Value* |
| Hypertension, n (%) | 83 (19.2) | 205 (27.8) | 183 (41.3) | 243 (45.3) | 714 (33.2) | <0.001 |
| Depression, n (%) | 128 (29.6) | 202 (27.4) | 123 (27.8) | 120 (22.4) | 573 (26.7) | 0.027 |
| Asthma, n (%) | 53 (12.3) | 78 (10.6) | 63 (14.2) | 53 (9.9) | 247 (11.5) | 0.59 |
| COPD, n (%) | 15 (3.5) | 24 (3.3) | 15 (3.4) | 23 (4.3) | 77 (3.6) | 0.44 |
| Myocardial infarction, n (%) | 4 (0.9) | 15 (2.0) | 8 (1.8) | 26 (4.9) | 53 (2.5) | <0.001 |
| Heart failure, n (%) | 2 (0.5) | 9 (1.2) | 5 (1.1) | 13 (2.4) | 29 (1.3) | 0.012 |
| Stroke, n (%) | 0 (0) | 1 (0.1) | 3 (0.7) | 5 (0.9) | 9 (0.4) | 0.008 |
COPF, chronic obstructive pulmonary disease; OSA, obstructive sleep apnoea.
*χ2 test (3 degrees of freedom).