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. 2019 Dec 2;2019(12):CD003531. doi: 10.1002/14651858.CD003531.pub4

Comparison 1. Auto‐CPAP versus fixed CPAP.

Outcome or subgroup title No. of studies No. of participants Statistical method Effect size
1 Machine usage (hours/night) 31 1452 Mean Difference (Fixed, 95% CI) 0.21 [0.11, 0.31]
2 Machine usage (hours/night) (Pepin imputed) 32 1774 Mean Difference (Fixed, 95% CI) 0.19 [0.10, 0.29]
3 Number of participants who used CPAP therapy > 4 hours per night 2 346 Odds Ratio (M‐H, Fixed, 95% CI) 1.16 [0.75, 1.81]
4 Machine usage (on nights when CPAP used 'effectively') 3   Mean Difference (Fixed, 95% CI) 0.42 [0.05, 0.78]
5 Machine usage (frequency of usage as % of days) 9   Mean Difference (Fixed, 95% CI) 1.60 [‐0.83, 4.03]
6 Machine usage (% of nights of > 4 hours of use) ‐ cross‐over studies 2   Mean Difference (Fixed, 95% CI) 6.25 [‐0.05, 12.54]
7 Symptoms (Epworth Sleepiness Scale) 25 1285 Mean Difference (Fixed, 95% CI) ‐0.44 [‐0.72, ‐0.16]
8 Withdrawals (parallel group trials/first arm cross‐over trials) 13 1275 Odds Ratio (M‐H, Fixed, 95% CI) 0.90 [0.64, 1.27]
9 Quality of life (Functional Outcomes of Sleep Questionnaire) 3 352 Mean Difference (Fixed, 95% CI) 0.12 [‐0.21, 0.46]
10 Quality of life (Sleep Apnoea Quality of Life Index) 2 97 Mean Difference (Fixed, 95% CI) ‐0.14 [‐0.54, 0.27]
11 Quality of life (SF‐36 questionnaire) 8   Mean Difference (Fixed, 95% CI) Subtotals only
11.1 Physical functioning 3   Mean Difference (Fixed, 95% CI) 0.76 [‐3.50, 5.01]
11.2 Role physical 2   Mean Difference (Fixed, 95% CI) ‐3.73 [‐13.46, 6.01]
11.3 Bodily pain 2   Mean Difference (Fixed, 95% CI) 4.21 [‐4.23, 12.64]
11.4 General health 2   Mean Difference (Fixed, 95% CI) 2.49 [‐4.99, 9.97]
11.5 Vitality 6   Mean Difference (Fixed, 95% CI) 1.32 [‐1.25, 3.88]
11.6 Social functioning 2   Mean Difference (Fixed, 95% CI) 3.31 [‐4.29, 10.92]
11.7 Role emotional 3   Mean Difference (Fixed, 95% CI) 0.70 [‐4.19, 5.59]
11.8 Mental health 3   Mean Difference (Fixed, 95% CI) 0.20 [‐1.88, 2.27]
12 Apnoea Hypopnoea Index (events/hr) 26 1256 Mean Difference (Fixed, 95% CI) 0.48 [0.16, 0.80]
13 Arousals (events/hr) 4 136 Mean Difference (Fixed, 95% CI) ‐0.66 [‐2.90, 1.58]
14 Pressure of CPAP treatment (cmH2O) 24 1171 Mean Difference (Fixed, 95% CI) ‐1.01 [‐1.17, ‐0.84]
15 Systolic blood pressure 2 353 Mean Difference (IV, Fixed, 95% CI) 1.87 [‐1.08, 4.82]
16 Diastolic blood pressure 2 353 Mean Difference (IV, Fixed, 95% CI) 2.92 [1.06, 4.77]
17 24‐hour mean BP 2 530 Mean Difference (IV, Fixed, 95% CI) 0.59 [‐1.05, 2.22]
18 24‐hour systolic BP 2 530 Mean Difference (IV, Fixed, 95% CI) ‐0.15 [‐2.21, 1.91]
19 24‐hour diastolic BP 2 530 Mean Difference (IV, Fixed, 95% CI) 0.90 [‐0.65, 2.44]
20 Diurnal mean BP 2 530 Mean Difference (IV, Fixed, 95% CI) 0.63 [‐1.05, 2.32]
21 Diurnal systolic BP 2 530 Mean Difference (IV, Fixed, 95% CI) ‐0.35 [‐2.44, 1.74]
22 Diurnal diastolic BP 2 530 Mean Difference (IV, Fixed, 95% CI) 0.91 [‐0.74, 2.55]
23 Nocturnal mean BP 2 530 Mean Difference (IV, Fixed, 95% CI) 0.43 [‐1.29, 2.15]
24 Nocturnal systolic BP 2 530 Mean Difference (IV, Fixed, 95% CI) 0.88 [‐1.81, 3.57]
25 Nocturnal diastolic BP 2 530 Mean Difference (IV, Fixed, 95% CI) 0.80 [‐0.81, 2.40]
26 Tolerability outcomes 1   Odds Ratio (M‐H, Fixed, 95% CI) Totals not selected
26.1 Intolerable treatment pressure 1   Odds Ratio (M‐H, Fixed, 95% CI) 0.0 [0.0, 0.0]
26.2 Mask leak 1   Odds Ratio (M‐H, Fixed, 95% CI) 0.0 [0.0, 0.0]
26.3 Dry mouth 1   Odds Ratio (M‐H, Fixed, 95% CI) 0.0 [0.0, 0.0]
26.4 Stuffy nose 1   Odds Ratio (M‐H, Fixed, 95% CI) 0.0 [0.0, 0.0]
27 Patient preference (auto‐CPAP/not auto‐CPAP) 14   Odds Ratio (M‐H, Random, 95% CI) Totals not selected