Table 3.
Baseline demographics of CPAP treatment and control groups of the included studies
| Studies | CPAP demographics | Control demographics | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| n | Age (years) | Male (%) | BMI (kg/m2) | AHI (events/h) | n | Age (years) | Male (%) | BMI (kg/m2) | AHI (events/h) | |
| Barbé et al., 2001[27] | 29 | 54 | 89.7 | 29.0 | 30.0 | 25 | 52 | 92.0 | 29.0 | 34.0 |
| Bardwell et al., 2001[28] | 20 | 47 | – | 32.8 | 56.8 | 16 | 48 | – | 29.6 | 43.6 |
| Barnes et al., 2004[23] | 80 | 47 | 79.8 | 31.1 | 21.3 | 80 | 47 | 79.8 | 31.1 | 21.3 |
| Engleman et al., 1994[22] | 32 | 49 | 81.2 | 33.0 | 28.0 | 32 | 49 | 81.2 | 33.0 | 28.0 |
| Engleman et al., 1997[20] | 16 | 52 | 75.0 | 29.8 | 11.0 | 16 | 52 | 75.0 | 29.8 | 11.0 |
| Engleman et al., 1999[21] | 23 | 47 | 91.3 | 30.0 | 43.0 | 23 | 47 | 91.3 | 30.0 | 43.0 |
| Gast et al., 2006[30] | 17 | 52 | 100 | 40.0 | 45.5 | 12 | 52 | 100 | 33.0 | 39.7 |
| Engleman et al., 1998[26] | 34 | 44 | 61.8 | 30.0 | 10.0 | 34 | 44 | 61.8 | 30.0 | 10.0 |
| Kushida et al., 2012[31] | 556 | 52.2 | 65.3 | 32.4 | 39.7 | 542 | 50.8 | 65.7 | 32.1 | 40.6 |
| Marshall et al., 2005[24] | 29 | 50.5 | 76.9 | 31.5 | 21.6 | 29 | 50.5 | 76.9 | 31.5 | 21.6 |
| Monasterio et al., 2001[25] | 66 | 53 | 81.0 | 29.4 | 220.0 | 59 | 54 | 91 | 29.5 | 21.0 |
| Pelletier–Fleury et al., 2004[29] | 82 | 53.8 | 84.3 | 30.5 | 55.6 | 89 | 52.1 | 80.5 | 29.7 | 49.0 |
| Prilipko et al., 2012[32] | 9 | 44.7 | 100 | 29.9* | 45.8 | 8 | 41.6 | 100 | 25.5 | 32.8 |
*Meant P<0.05 between CPAP and control groups; n: Number of the participants in the group; Male (%): Ratio of male in all the participants. BMI: Body mass index; AHI: Apnea/hypopnea index; CPAP: Continuous positive airway pressure.