Ref (type)	Population	Outcome, Interventions	Results and statistical analysis	Effect size	Favours
Functional assessment
RCT	66 people In review	American Orthopaedic Foot and Ankle Scale (AOFAS) total score at 22 months 90 with proximal chevron osteotomy 92 with proximal crescentic osteotomy	Mean difference: +2.00 95% CI –4.32 to +8.32 The RCT did not include longer-term follow-up		Not significant