Fig. 5From: Perioperative outcomes in different anesthesia techniques for patients undergoing hip fracture surgery: a systematic review and meta-analysisForest plots showing pooled effect estimates for pneumonia when comparing general with regional anesthesia. The odds ratio was calculated with a fixed effect method. 5.1.1: The odds ratio of the randomized controlled studies represented a subgroup. 5.1.2: The odds ratio of the retrospective observational studies represented a subgroupBack to article page