Evidence map›Paper›PMID 42017168›Full record

ArticleNorth American Spine Society journal2026

Baseline characteristics, perioperative complications, and 1-year outcomes in cervical OPLL versus cervical spondylotic myelopathy: a multicenter retrospective cohort study.

Yasushi Oshima, Toru Doi, Hideki Nakamoto, Hiroyuki Nakarai, Yusuke Sato, Katsuyuki Sasaki, Naohiro Tachibana, Fumihiko Oguchi, Fumiko Saiki, Masayoshi Fukushima and 9 more

Abstract read
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In one paragraph

Article in North American Spine Society journal, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

0numbers the graph read from it
0cells of the map it votes in
0citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

0 citing papers in PubMed.

No citing paper in PubMed yet.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

19 authors.

Yasushi OshimaDepartment of Orthopaedic Surgery, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan.
Toru DoiDepartment of Orthopaedic Surgery, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan.
Hideki NakamotoDepartment of Orthopaedic Surgery, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan.
Hiroyuki NakaraiDepartment of Orthopaedic Surgery, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan.
Yusuke SatoUniversity of Tokyo Spine Group (UTSG), 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan.
Katsuyuki SasakiUniversity of Tokyo Spine Group (UTSG), 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan.
Naohiro TachibanaUniversity of Tokyo Spine Group (UTSG), 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan.
Fumihiko OguchiUniversity of Tokyo Spine Group (UTSG), 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan.
Fumiko SaikiUniversity of Tokyo Spine Group (UTSG), 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan.
Masayoshi FukushimaUniversity of Tokyo Spine Group (UTSG), 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan.
Chiaki HoriiUniversity of Tokyo Spine Group (UTSG), 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan.
Naoki OkamotoUniversity of Tokyo Spine Group (UTSG), 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan.
Shima HiraiUniversity of Tokyo Spine Group (UTSG), 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan.
Masahito OshinaUniversity of Tokyo Spine Group (UTSG), 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan.
Junya MiyaharaUniversity of Tokyo Spine Group (UTSG), 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan.
Kazuhiro MasudaUniversity of Tokyo Spine Group (UTSG), 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan.
So KatoDepartment of Orthopaedic Surgery, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan.
Yuki TaniguchiDepartment of Orthopaedic Surgery, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan.
Sakae TanakaDepartment of Orthopaedic Surgery, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Background: Cervical ossification of the posterior longitudinal ligament (OPLL) is an important cause of degenerative cervical myelopathy. Unlike cervical spondylotic myelopathy (CSM), OPLL has been increasingly recognized as a distinct phenotype with potential systemic metabolic and mineral-regulatory associations. The purpose of this study was to compare baseline characteristics, perioperative complications, and patient-reported outcomes (PROs) between cervical OPLL and CSM. Methods: This retrospective multicenter cohort study included patients undergoing surgery for cervical myelopathy due to OPLL or CSM at 13 high-volume spine centers. Baseline characteristics, comorbidities, serum phosphate levels, perioperative complications, and outcomes were assessed. PROs comprised numerical rating scales for neck and arm pain, the Neck Disability Index, the EuroQol 5-Dimension, the 12-Item Short Form Survey, and the Core Outcome Measures Index. Outcomes were evaluated preoperatively and at 1 year. Inverse probability of treatment weighting was used to adjust for baseline differences. Results: A total of 1,824 patients were included (OPLL, n = 317; CSM, n = 1,507). Patients with OPLL were younger, more frequently male, and had higher body mass index. Diabetes was more prevalent and serum phosphate levels were lower in OPLL, and these differences persisted after IPW adjustment. Crude perioperative neurologic complications were more frequent in OPLL, but the difference was attenuated after weighting. Postoperative PROs at 1 year did not differ significantly between groups. Conclusions: Cervical OPLL and CSM demonstrate distinct baseline profiles, particularly with respect to metabolic comorbidities, body habitus, and serum phosphate levels. Although crude perioperative complication rates were higher in OPLL, these differences were largely explained by baseline characteristics after adjustment.

Indexed as

Body mass indexComplicationsCSMDegenerative cervical myelopathyDiabetes mellitusInverse probability weightingOPLLPatient-reported outcomesPhosphate

Identifiers

PMID42017168
PMCPMC13094433

What Socratic holds

Textmetadata
LicenceCC BY-NC-ND
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the Socratic graph.