Fig. 2From: Cannabis use is associated with a small increase in the risk of postoperative nausea and vomiting: a retrospective machine-learning causal analysisSample mean predicted probability of PONV of postoperative nausea/vomiting stratified by Apfel score and conditioned on pattern of cannabis use. 95% Bayesian posterior credible interval for mean probability generated from 1000 MCMC estimates. Pooled mean probability estimate across all Apfel scores showed at right of each groupingBack to article page