Fig. 3From: Comparison of smith-petersen osteotomy, pedicular subtraction osteotomy, and poly-segmental wedge osteotomy in treating rigid thoracolumbar kyphotic deformity in ankylosing spondylitis a systematic review and meta-analysisTitle: Comparison of local biomechanical complications in SPO, PSO, and PWO; CI. Information: The risk ratio of PWO to PSO was 1.97 and significantBack to article page