Fruergaard S, Ohrt-Nissen S, Pitter FT, et al. - A retrospective nationwide cohort study was performed to explore the 2-year revision risk following surgery for primary pediatric spinal deformity in a nationwide cohort and to assess potential risk factors and reasons for revision surgery. Researchers designed a national registry study including a total of 1,310 pediatric spinal deformity patients undergoing surgery during 2006–2015. After primary pediatric spinal deformity surgery, the 2-year revision risk is 9.2% in this nationwide study. The results demonstrated that the risk factors for revision are etiology of congenital deformity, spondylolisthesis, Scheuermann kyphosis as well as patients with growth-preserving treatment and higher Charlson comorbidity index. Implant failure is the most common reason for revision.