Ref (type)	Population	Outcome, Interventions	Results and statistical analysis	Effect size	Favours
Successful irrigation (syringing)
Systematic review	45 people Data from 1 RCT	Successful syringing 75% with triethanolamine polypeptide/propylene glycol/chlorbutol/water (water base)-based proprietary preparation 5% with no treatment Absolute numbers not reported	OR 60 95% CI 6.6 to 547.3 The confidence limits are wide, and blinding in the RCT was inadequate	Large effect size	water-based proprietary preparation