Fig. 6From: Effect of ultrasound-guided lung recruitment to reduce pulmonary atelectasis after non-cardiac surgery under general anesthesia: a systematic review and meta-analysis of randomized controlled trialsForest plot for subgroup analysis of the incidence of postoperative atelectasis between the ultrasound-guided and control groups. Grouped by PEEP after LRM: PEEP (ultrasound-guided) = PEEP (control), PEEP (ultrasound-guided) > PEEP(Control). PEEP = positive end-expiratory pressure, CI = confidence interval, RR = risk ratio, M-H = methods of merging dichotomous variablesBack to article page