Fig. 2From: Preoperative opioid use is associated with worse patient outcomes after Total joint arthroplasty: a systematic review and meta-analysisForest plot comparing absolute PRO scores between opioid users and opioid-naïve-patients (CI, confidence interval; IV, Inverse variance; Random, random effects model; SMD, standard mean difference; SD, standard deviation. Individual studies SMD; pooled SMD)Back to article page