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Table 4 Study outcomes by treatment group

From: Femoroacetabular Impingement Randomised controlled Trial (FIRST) - a multi-centre randomized controlled trial comparing arthroscopic lavage and arthroscopic osteochondroplasty on patient important outcomes and quality of life in the treatment of young adult (18–50 years) femoroacetabular impingement: a statistical analysis plan

  Treatment X n = Treatment Y n = Mean differencea (95% CI) p value
mean (SD) mean (SD)
Primary outcome (pain as measured by VAS)     
Secondary outcomes     
 SF-12 PCS     
 SF-12 MCS     
 HOS     
 iHOT-12     
 EQ-5D utility score     
  n (%) n (%) Odds ratiob (95% CI) p value
Hip-related complications     
Re-operations     
  1. VAS visual analogue scale, PCS physical component summary, MCS mental component summary, HOS Hip Outcome Score, iHOT International Hip Outcome Tool, EQ-5D Euroqol-5 Dimensions, SD standard deviation, CI confidence interval
  2. aFrom the multiple linear regression model
  3. bFrom the logistic regression model