Table 1.
Summary of findings for articles reporting V˙O2 peak.
| Author | Year | AHI Cut-off events/h | Baseline AHI/RDI events/h | Sample Size (n) | Age (years) | Duration of CPAP | Adherence to CPAP (hrs·n–1) | Design | V̇O2 peak or V̇O2 max | Pre (mL·kg–1·min–1) | Post (mL·kg–1·min–1) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Taguchi26 | 1997 | Not reported | 62.5 ± 8.6 | 6 | 44.7 ± 13.7 | 7 days | Not reported | Q | V̇O2 max (mL·min–1) | 22.13 ± 4.56* | 25.9 ± 4.8* |
| Ozsarac25 | 2014 | > 30 | 40.7 ± 19.6 | 65 | 48.76 ± 9.2 | 4 weeks | 6.2 ± 0.9 | Q | V̇O2 max (mL·min–1) | 22.5 ± 6.6* | 21.3 ± 5.3* |
| Alonso-Fernández10 | 2006 | > 10 | 43.6 ± 26.6 | 31 | 53 ± 13 | 12 weeks | 6 ± 1 | RCT | V̇O2 peak | 24.53 ± 6.15 | 25.1 ± 8.58 |
| Goel27 | 2015 | > 10 | 35.32 ± 16.99 | 15 | 56.5 ± 9.1 | 4 weeks | Not reported | Q | V̇O2 peak (mL·min–1) | 12.83 ± 3.3* | 17.46 ± 4.44* |
| Lin28 | 2004 | RDI ≥ 30 | 47.3 ± 15.7 | 20 | 43 ± 8 | 2 months | Not reported | Q | V̇O2 peak | 20.41 ± 3.31 | 26.3 ± 4.29 |
| Mortari29 | 2017 | > 30 | 61.7 ± 23.4 | 16 | 52.8 ± 10.8 | 3 months | 6.7 ± 2** | R | V̇O2 peak | 27.81 ± 9.91 | 29.71 ± 7.83 |
| Pendharker30 | 2011 | > 15 | 48.1 ± 33.1 | 15 | 49 ± 6 | 3 months | 5.8 ± 2s | Q | V̇O2 peak | 17 ± 4.2 | 16.6 ± 3.5 |
| Quadri31 | 2017 | > 30 | 45.4 ± 14.9 | 12 | 58 ± 9.7 | 2 months | Not reported | Q | V̇O2 peak | 21.1 ± 3.8 | 23.4 ± 4.3 |
Data are presented as n or mean ± SD, unless reported otherwise. *Original data in articles in mL/min, uncertainty analysis used to change. **Extrapolated from the total hours usage data over 3 months (603 ± 180 written in article). AHI = apnea-hypopnea index, CPAP = continuous positive airway pressure, OSA = obstructive sleep apnea, OSAHS = obstructive sleep apnea hypopnea syndrome, Q = quasi-experimental single group designed study, R = retrospective study, RCT = randomized controlled trial, RDI = respiratory disturbance index, V̇O2 max = peak rate of oxygen uptake, V̇O2 peak = maximum rate of oxygen uptake.