Table 1

Outcome and statistical methods

Outcome variableStatistical methodEffect measure
Inverse varianceMean difference
Surgical time complications
 IntraoperativePetoPeto OR
 PostoperativePetoPeto OR
 TotalPetoPeto OR
 From randomised clinical trialPetoPeto OR
Functional outcome
 PreoperativeInverse varianceStd mean difference
 PostoperativeInverse varianceStd mean difference
Radiographic outcome
 Limb length discrepancy (LLD)Inverse varianceMean difference
 LLD >10 mmPetoPeto OR
 Cup placementInverse varianceOR
 Heterotopic ossificationPetoPeto OR