Fig. 2From: Acupuncture-related techniques for postoperative cognitive complications: a systemic review and meta-analysisForest plot for the incidence of PCC during hospital stay. The plot shows decreased incidence in patients treated with acupuncture-related techniques compared with non-acupuncture controls. Fixed-effects odds ratios are calculated using the Mantel–Haenszel test. Error bars represent 95% CI. OR = odds ratioBack to article page