{"doi":"10.1177/21925682211036660","title":"Risk Factors for Cervical Deformity After Posterior Cervical Decompression Surgery: A Multicenter Study","abstract":"STUDY DESIGN: Retrospective multicenter study. OBJECTIVE: Posterior decompression surgery for cervical spondylotic myelopathy (CSM) and ossification of the posterior longitudinal ligament (OPLL) is a common surgery; however, it can cause postoperative cervical deformity (CD). The purpose of this study was to investigate the risk factors for CD. METHODS: The participants were 193 patients underwent laminoplasty or laminectomy for CSM or OPLL. CD was defined as a C2-7 sagittal vertical axis (SVA) ≥ 40 mm or a cervical lordosis angle (CL) ≤ -10°. The participants were divided into 2 groups: NCD (without CD before surgery), CD (with CD before surgery). NCD group was divided based on the presence of CD 1 year after surgery as follows: postoperative CD (PCD) and no PCD (NPCD). RESULTS: There were 153 patients (NCD), 40 (CD), 126 (NPCD), and 27 (PCD). There was significant difference in the number of decompressed lamina (NPCD: PCD = 4.1:4.5), the presence of C2 decompression (2: 11%), and C5 palsy (0: 11%). The risk factors for onset of CD, PCD, and CL ≤ -10° as assessed by multiple logistic regression analysis were preoperative C2-7 SVA ≥ 30 mm (odds ratio [OR]: 19.0), decompression of C2 or C7 lamina (OR 3.1), and preoperative CL ≤ 2° (OR 42.0), respectively. CONCLUSIONS: To prevent postoperative CD, it is important to avoid decompression of the C2 or C7 lamina. Moreover, in case with C2-7 SVA ≥ 30 mm or CL ≤ 2° before surgery, it is important to explain the risks and consider adding fusion surgery.","journal":"Global Spine Journal","year":2021,"id":194085,"datarank":0.0,"base_score":0.0,"endowment":0.0,"self_citation_contribution":0.0,"citation_network_contribution":0.0,"self_endowment_contribution":0.0,"citer_contribution":0.0,"corpus_percentile":null,"corpus_rank":null,"citation_count":10,"citer_count":0,"citers_with_citation_signal":0,"citers_with_endowment":0,"datacite_reuse_total":0,"is_dataset":false,"is_dataset_confidence":0.9548,"is_data_producer":false,"deposit_databanks":null,"is_oa":true,"file_count":0,"downloads":0,"has_version_chain":false,"published_date":"2021-01-01","fair_score":null,"fair_percentile":null,"algorithm_id":"datarank_citation_only_1hop_v6","ranking_scope":"data_only","authors":[{"id":763283,"name":"Kenta Kurosu","orcid":"0000-0001-7660-2655","position":1,"is_corresponding":false},{"id":437453,"name":"Tomohiko Hasegawa","orcid":"0000-0002-6219-431X","position":2,"is_corresponding":false},{"id":763284,"name":"Satoshi Shimizu","orcid":"0000-0002-7270-0781","position":3,"is_corresponding":false},{"id":437454,"name":"Go Yoshida","orcid":"0000-0003-0265-6372","position":4,"is_corresponding":false},{"id":763890,"name":"Tomotada Fujita","orcid":null,"position":5,"is_corresponding":false},{"id":437455,"name":"Sho Kobayashi","orcid":"0000-0002-8002-2001","position":6,"is_corresponding":false},{"id":437461,"name":"Tomohiro Yamada","orcid":"0000-0002-7220-7321","position":7,"is_corresponding":false},{"id":437462,"name":"Koichiro Ide","orcid":"0000-0003-4253-568X","position":8,"is_corresponding":false},{"id":763285,"name":"Keiichi Nakai","orcid":"0000-0002-0330-9914","position":9,"is_corresponding":false},{"id":763286,"name":"Kumiko Yotsuya","orcid":"0009-0009-6592-753X","position":10,"is_corresponding":false},{"id":437452,"name":"Yu Yamato","orcid":"0000-0002-4701-8211","position":11,"is_corresponding":false},{"id":437456,"name":"Tatsuya Yasuda","orcid":"0000-0001-9587-4840","position":12,"is_corresponding":false},{"id":437457,"name":"Tomohiro Banno","orcid":"0000-0002-6938-7501","position":13,"is_corresponding":false},{"id":437458,"name":"Hideyuki Arima","orcid":"0000-0003-0586-6818","position":14,"is_corresponding":false},{"id":437459,"name":"Yuki Mihara","orcid":"0000-0002-8381-3466","position":15,"is_corresponding":false},{"id":437460,"name":"Hiroki Ushirozako","orcid":"0000-0002-7722-2205","position":16,"is_corresponding":false},{"id":437463,"name":"Yuh Watanabe","orcid":"0000-0002-9701-2053","position":17,"is_corresponding":false},{"id":437465,"name":"Yukihiro Matsuyama","orcid":"0000-0002-6506-3454","position":18,"is_corresponding":false},{"id":437451,"name":"Shin Oe","orcid":"0000-0002-0794-4026","position":0,"is_corresponding":true}],"reference_count":29,"raw_metadata":null,"created_at":"2026-07-18T23:49:55.282992Z","pmid":"34344229","pmcid":null,"fwci":null,"citation_percentile":null,"influential_citations":0,"oa_status":null,"license":null,"views":0,"total_file_size_bytes":0,"version_count":0,"fair_f":null,"fair_a":null,"fair_i":null,"fair_r":null,"fair_zscore":null,"fair_rationale":null,"fair_model":null,"fair_agent_version":null,"fair_fulltext_source":null,"fair_has_llm":null,"fair_computed_at":null,"clinical_trials":[],"software_tools":[],"db_accessions":[],"linked_datasets":[],"topics":[]}