Ficker 2003.

Methods	Randomised, parallel group study. Methods of randomisation not reported. Devices were identical in appearance.
Participants	N = 100 participants. Mean age: 54.3; BMI: 31.8; AHI: 47.9; ESS: 12.6 Inclusion criteria: diurnal somnolence (≥ 8 on ESS); AHI > 10; written consent Exclusion criteria: prior CPAP therapy; central sleep apnoea or Cheyne‐Stokes respiration; severe nasal obstruction or other conditions contraindicating CPAP treatment; COPD (FEV1 < 70% predicted); congestive heart failure (NYHA III or IV)
Interventions	Auto‐CPAP (forced oscillation technique) versus fixed CPAP Conference abstract reported 8 weeks duration (published paper reported 2 nights data from laboratory studies)
Outcomes	Machine usage (average hours used) AHI Symptoms (ESS) Quality of life (SF‐36) Treatment pressure
Funding & conflicts of interest statements	Not available (conference abstract)
Notes
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Information not available
Allocation concealment (selection bias)	Unclear risk	Information not available
Blinding of participants and personnel (performance bias) Machine usage, symptoms, quality of life, withdrawal, adverse effects	Unclear risk	Information not available
Blinding of participants and personnel (performance bias) AHI, blood pressure, treatment pressure	Unclear risk	Information not available
Blinding of outcome assessment (detection bias) Machine usage, symptoms, quality of life, withdrawal, adverse effects	Unclear risk	Information not available
Blinding of outcome assessment (detection bias) AHI, blood pressure, treatment pressure	Unclear risk	Information not available
Incomplete outcome data (attrition bias) All outcomes	Unclear risk	Information not available
Selective reporting (reporting bias)	Unclear risk	Information not available
Other bias	Unclear risk	Information not available