Ref (type)	Population	Outcome, Interventions	Results and statistical analysis	Effect size	Favours
Adverse effects
RCT	Number of people unclear In review	Adverse effects with oral appliance with no appliance or a control appliance Absolute results not reported
RCT Crossover design	85 people with mild to severe OSAHS (mean AHI 26.9)	intolerance to oral appliance with active oral appliance with inactive oral appliance