Baseline characteristics of each study and overall
| Barbé et al10 | Robinson et al13 | Barbé et al9 | Craig et al12 | Total | |
|---|---|---|---|---|---|
| Sample size | 54 | 33 | 724 | 391 | 1202 |
| Age (years) | 52.9 (9.8) | 54.3 (8.9) | 51.4 (10.9) | 57.7 (7.4) | 53.6 (10.2) |
| Gender (male) | 49 (91%) | 29 (88%) | 620 (86%) | 305 (78%) | 1003 (83%) |
| ESS | 7.4 (2.1) | 5.9 (2.6) | 6.5 (2.3) | 8.0 (4.3) | 7.0 (3.1) |
| ODI | – | 27.5 (18–37.6) | – | 9.8 (4.9–16.2) | 10.6 (5.4–19.1) |
| AHI | 53.6 (40.5–70) | – | 37 (27–55) | – | 38 (28–56) |
| SBP (mm Hg) | 134.7 (17.1) | 146.3 (18.5) | 131.2 (16.7) | 129.7 (12.7) | 131.2 (15.8) |
| DBP (mm Hg) | 83.8 (10.3) | 91.4 (12.1) | 80.0 (11.2) | 81.3 (7.9) | 80.9 (10.4) |
| BMI (kg/m2) | 29.4 (3.6) | 33.2 (5.3) | 31.3 (5.1) | 32.4 (5.6) | 31.6 (5.3) |
| Smokers | 17 (31%) | – | 208 (29%) | 45 (12%) | 270 (23%) |
| Cholesterol | – | – | 5.5 (1.1) | 5.2 (1.2) | 5.4 (1.1) |
| Antihypertensive medication | 21 (39%) | 27 (82%) | 260 (36%) | 193 (49%) | 501 (42%) |
| Prior vascular events | 2 (4%) | – | – | 222 (57%) | 224 (19%) |
| Diabetes | – | 4 (12%) | – | 63 (16%) | 67 (16%) |
Data are summarised as mean (SD), median (25th—75th centile) or N(%) as appropriate. Note: not all baseline characteristics were available for all studies.
AHI, apnoea–hypopnoea index; BMI, body mass index; DBP, diastolic blood pressure; ESS, Epworth Sleepiness Score; ODI, oxygen desaturation index; SBP, systolic blood pressure.