Summary of Findings and Quality of Evidence Assessment (GRADE).

RR = risk ratio; OR = odds ratio; CI = confidence interval; m = metres; mL = millilitres; min = minutes. aEffect size is mean difference, unless otherwise specified. Negative value favours first comparator. Effect sizes (95% CI) in bold indicate statistically significant results. bDichotomous data: Walking ability better (ability to walk 50% farther or increase of 80 m in the walking distance postoperatively) or same/worse, effect size reported as risk ratio or odds ratio. Summary of Findings and Quality of Evidence Assessment (GRADE).