Evidence map›Paper›PMID 32539767›Full record

Observational studyBMC musculoskeletal disorders2020

Impact of Spinopelvic sagittal alignment on the surgical outcomes of dropped head syndrome: a multi-center study.

Yoshifumi Kudo, Tomoaki Toyone, Kenji Endo, Yuji Matsuoka, Ichiro Okano, Koji Ishikawa, Akira Matsuoka, Hiroshi Maruyama, Ryo Yamamura, Haruka Emori and 10 more

Abstract readMulticenter StudyObservational Study
PubMed Full text at PMC Publisher
In one paragraph

Observational study in BMC musculoskeletal disorders, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.

0numbers the graph read from it
0cells of the map it votes in
9citing 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

9 citing papers in PubMed.

  1. Three-dimensional gait analysis reveals differences in spinal balance and muscle activity during prolonged walking in patients with dropped head syndrome based on global spinal alignment.European spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society · 2026
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  6. Dropped head syndrome: a treatment strategy and surgical intervention.European spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society · 2023
    Article
  7. Review
  8. Article
  9. Radiological features of cervical spine in dropped head syndrome: a matched case-control study.European spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society · 2021
    Article
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

20 authors.

Yoshifumi KudoDepartment of Orthopaedic Surgery, Showa University, 1-5-8 Hatanodai Shinagawa-ku, Tokyo, 142-8666, Japan. kudo_4423@yahoo.co.jp.
Tomoaki ToyoneDepartment of Orthopaedic Surgery, Showa University, 1-5-8 Hatanodai Shinagawa-ku, Tokyo, 142-8666, Japan.
Kenji EndoDepartment of Orthopedic Surgery, Tokyo Medical University, 6-7-1 Nishishinjuku, Shinjuku-ku, Tokyo, 160-0023, Japan.
Yuji MatsuokaDepartment of Orthopedic Surgery, Tokyo Medical University, 6-7-1 Nishishinjuku, Shinjuku-ku, Tokyo, 160-0023, Japan.
Ichiro OkanoDepartment of Orthopaedic Surgery, Showa University, 1-5-8 Hatanodai Shinagawa-ku, Tokyo, 142-8666, Japan.
Koji IshikawaDepartment of Orthopaedic Surgery, Showa University, 1-5-8 Hatanodai Shinagawa-ku, Tokyo, 142-8666, Japan.
Akira MatsuokaDepartment of Orthopaedic Surgery, Showa University, 1-5-8 Hatanodai Shinagawa-ku, Tokyo, 142-8666, Japan.
Hiroshi MaruyamaDepartment of Orthopaedic Surgery, Showa University, 1-5-8 Hatanodai Shinagawa-ku, Tokyo, 142-8666, Japan.
Ryo YamamuraDepartment of Orthopaedic Surgery, Showa University, 1-5-8 Hatanodai Shinagawa-ku, Tokyo, 142-8666, Japan.
Haruka EmoriDepartment of Orthopaedic Surgery, Showa University, 1-5-8 Hatanodai Shinagawa-ku, Tokyo, 142-8666, Japan.
Soji TaniDepartment of Orthopaedic Surgery, Showa University, 1-5-8 Hatanodai Shinagawa-ku, Tokyo, 142-8666, Japan.
Toshiyuki ShirahataDepartment of Orthopaedic Surgery, Showa University, 1-5-8 Hatanodai Shinagawa-ku, Tokyo, 142-8666, Japan.
Chikara HayakawaDepartment of Orthopaedic Surgery, Showa University, 1-5-8 Hatanodai Shinagawa-ku, Tokyo, 142-8666, Japan.
Yushi HoshinoDepartment of Orthopaedic Surgery, Showa University, 1-5-8 Hatanodai Shinagawa-ku, Tokyo, 142-8666, Japan.
Tomoyuki OzawaDepartment of Orthopaedic Surgery, Showa University, 1-5-8 Hatanodai Shinagawa-ku, Tokyo, 142-8666, Japan.
Hidekazu SuzukiDepartment of Orthopedic Surgery, Tokyo Medical University, 6-7-1 Nishishinjuku, Shinjuku-ku, Tokyo, 160-0023, Japan.
Takato AiharaDepartment of Orthopedic Surgery, Tokyo Medical University, 6-7-1 Nishishinjuku, Shinjuku-ku, Tokyo, 160-0023, Japan.
Kazuma MurataDepartment of Orthopedic Surgery, Tokyo Medical University, 6-7-1 Nishishinjuku, Shinjuku-ku, Tokyo, 160-0023, Japan.
Taichiro TakamatsuDepartment of Orthopedic Surgery, Tokyo Medical University, 6-7-1 Nishishinjuku, Shinjuku-ku, Tokyo, 160-0023, Japan.
Katsunori InagakiDepartment of Orthopaedic Surgery, Showa University, 1-5-8 Hatanodai Shinagawa-ku, Tokyo, 142-8666, Japan.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundMost of the previous studies about the surgical treatment of dropped head syndrome (DHS) are small case series, and their primary outcome measures were cervical alignment parameters. Therefore, little is known about the associations between pre- and postoperative global sagittal alignment in the whole spine and the clinical outcomes of the surgical treatment of DHS. In this study, we investigated the surgical outcomes of DHS, including correction of cervical and global spinal sagittal alignment.

methodsThis study was a retrospective observational study. Fifteen patients with DHS who had undergone correction surgery were enrolled. Surgical outcomes, including complications and implant failures, were investigated. We assessed cervical alignment parameters as well as spinopelvic global alignment parameters, including pelvic incidence (PI), lumbar lordosis (LL), and C7-sacral sagittal vertical axis (SVA). We examined the changes in these parameters using pre- and posoperative whole spine lateral radiographs. The parameters were compared between the failure and nonfailure groups.

resultsRecurrence of sagittal imbalance and horizontal gaze difficulty was observed in 6 cases (40%). In all, 3 cases (20%) exhibited a distal junctional failure and required multiple surgeries with extension of fusion. Of all the radiographic parameters compared between the failure and nonfailure groups, significant differences were only observed in pre and postoperative SVA and PI-LL.

conclusionsOur results suggest that the global sagittal alignment parameters, including PI-LL and SVA, were different between the patients with failure and non failure, and these parameters might have notable impacts on surgical outcomes. Surgeons should consider PI-LL and SVA while determining the surgical course for patients with DHS.

Indexed as

AdultAgedAged, 80 and overFemaleHead MovementsHumansMaleMiddle AgedMuscle WeaknessPostoperative ComplicationsRadiographyRetrospective StudiesSpinal CurvaturesSpinal FusionSpineSyndromeChin-on-chest deformityCompensatory functionDropped head syndromeSagittal vertical axisSpinopelvic sagittal alignmentSurgical outcome

Identifiers

PMID32539767
PMCPMC7296732

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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 OpenQuestion graph.