Evidence map›Paper›PMID 41165781›Full record

ArticleEuropean spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society2026

One-year body mass index change and subsequent risk of lumbar disc herniation: a population-based cohort study.

Soichiro Masuda, Toshiki Fukasawa, Shuichi Matsuda, Koji Kawakami

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Article in 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. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

0numbers the graph read from it
0cells of the map it votes in
1citing 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

1 citing paper in PubMed.

  1. Answer to the Letter to the Editor of T. Xu, et al. concerning "One-year body mass index change and subsequent risk of lumbar disc herniation: a population-based cohort study" by S. Masuda, et al. (Eur Spine J; doi: 10.1007/s00586-025-09508-2).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 · 2025
    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

4 authors.

Soichiro MasudaDepartment of Pharmacoepidemiology, Kyoto University, Kyoto, Japan.
Toshiki FukasawaDepartment of Pharmacoepidemiology, Kyoto University, Kyoto, Japan.
Shuichi MatsudaDepartment of Orthopaedic Surgery, Kyoto University, Kyoto, Japan.
Koji KawakamiDepartment of Pharmacoepidemiology, Kyoto University, Kyoto, Japan. kawakami.koji.4e@kyoto-u.ac.jp.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeThis study aimed to investigate the association between one-year changes in body mass index (BMI) and subsequent risk of developing lumbar disc herniation (LDH).

methodsA population-based cohort study was conducted using a Japanese administrative claims database, including 4,121,849 individuals with no prior history of LDH who underwent annual health checkups. A multivariable Cox proportional hazards model with restricted cubic splines was used to analyze the dose-response associations between a one-year change in BMI and the risk of development of LDH, adjusting for potential confounders. To assess for effect modification, a subgroup analysis was performed, stratifying participants by baseline BMI categories: <18.5, 18.5 to < 25, 25 to < 30, ≥30.0 kg/m

resultsDuring the one-year follow-up, 15,099 individuals developed LDH (1-year risk, 0.38%; 95% confidence interval, 0.37 to 0.39). A restricted spline curve showed that a greater increase in BMI was associated with a higher risk of developing LDH, and this risk increased linearly for BMI changes exceeding 2%. In contrast, the subgroup analysis revealed that among individuals with a BMI ≥ 30 kg/m

conclusionOne-year changes in BMI are significantly associated with the risk of developing LDH, but this relationship is dependent on an individual's baseline BMI. This finding can contribute to the development of preventive strategies such as weight management and exercise therapy for LDH.

Indexed as

Body Mass IndexIntervertebral Disc DisplacementLumbar VertebraeAdultAgedCohort StudiesFemaleHumansJapanMaleMiddle AgedRisk FactorsBMIBody mass indexEpidemiologyLDHLumbar disc herniationRestricted cubic splineRisk.

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Registered trials

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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.