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ArticleOsteoporosis international : a journal established as result of cooperation between the European Foundation for Osteoporosis and the National Osteoporosis Foundation of the USA2026

Side-to-side differences in hip bone mineral density and associated morphological factors.

Keisuke Uemura, Yoshito Otake, Mazen Soufi, Sotaro Kono, Ryo Higuchi, Tomoki Asano, Hirokazu Mae, Tetsuro Tani, Kazuma Takashima, Yoshinobu Sato and 2 more

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Article in Osteoporosis international : a journal established as result of cooperation between the European Foundation for Osteoporosis and the National Osteoporosis Foundation of the USA, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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1 · What the graph read from it

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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

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3 · Its place in the literature

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4 · The record

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5 · Who and what money

Authors and funding

12 authors.

Keisuke UemuraDepartment of Orthopaedic Medical Engineering, Osaka University Graduate School of Medicine, Suita, Osaka, Japan. surmountjp@gmail.com.ORCID http://orcid.org/0000-0002-9245-1743
Yoshito OtakeDivision of Information Science, Graduate School of Science and Technology, Nara Institute of Science and Technology, Ikoma, Nara, Japan.
Mazen SoufiDivision of Information Science, Graduate School of Science and Technology, Nara Institute of Science and Technology, Ikoma, Nara, Japan.
Sotaro KonoDepartment of Orthopaedic Surgery, Osaka University Graduate School of Medicine, Suita, Osaka, Japan.
Ryo HiguchiDepartment of Orthopaedic Surgery, Osaka University Graduate School of Medicine, Suita, Osaka, Japan.
Tomoki AsanoDepartment of Orthopaedic Surgery, Osaka University Graduate School of Medicine, Suita, Osaka, Japan.
Hirokazu MaeDepartment of Orthopaedic Surgery, Osaka University Graduate School of Medicine, Suita, Osaka, Japan.
Tetsuro TaniDepartment of Orthopaedic Medical Engineering, Osaka University Graduate School of Medicine, Suita, Osaka, Japan.
Kazuma TakashimaDepartment of Orthopaedic Surgery, Osaka University Graduate School of Medicine, Suita, Osaka, Japan.
Yoshinobu SatoDepartment of Mathematical and AI Medical Science, Nara Medical University, Kashihara, Nara, Japan.
Seiji OkadaDepartment of Orthopaedic Surgery, Osaka University Graduate School of Medicine, Suita, Osaka, Japan.
Hidetoshi HamadaDepartment of Orthopaedic Medical Engineering, Osaka University Graduate School of Medicine, Suita, Osaka, Japan.

Funding

Cross-ministerial Strategic Innovation Promotion Program JPJ012425Japanese Orthopaedic Association 2023-2Japan Society for the Promotion of Science 21K16655Japan Society for the Promotion of Science 24K19617
6 · The paper itself

Abstract

In the analysis of 82 participants using quantitative computed tomography (QCT) images, side-to-side differences in hip bone mineral density were 3.0%. Gluteal muscle volume and femoral anteversion asymmetry contributed to these discrepancies. Bilateral hip assessment may improve the detection of osteoporosis, particularly when QCT data are available. PURPOSE: Side-to-side differences in hip bone mineral density (BMD) are occasionally observed in clinical practice. However, the factors contributing to this asymmetry remain unclear. Therefore, this study aimed to quantify differences in BMD between the right and left hips and identify morphological factors associated with these differences using quantitative computed tomography (QCT).

methodsThis prospective study included 82 adults (median age: 75 years) without a history of lower extremity disorders. Bilateral total hip BMD was calculated from the QCT data using a previously validated deep learning method. Side-to-side percentage differences were calculated. Participants with differences exceeding 5%, the least significant change recommended for dual-energy X-ray absorptiometry (DXA), were identified. Morphological variables, including gluteal muscle volume and femoral anteversion, were extracted bilaterally, and multivariate analyses were performed to examine their associations with BMD differences.

resultsThe median side-to-side BMD difference was 3.0% (interquartile range: 1.6%-5.8%). In 26% of the participants, the BMD differences exceeded 5%. When bilateral data were used, the proportion of participants with T-scores ≤  - 2.5 increased by 2%. Multivariate analysis revealed that greater differences in gluteal muscle volume and femoral anteversion were independently associated with larger differences in BMD. Specifically, the side with smaller gluteal muscle volume and greater femoral anteversion exhibited lower BMD.

conclusionsA considerable proportion of older adults exhibited clinically relevant side-to-side differences in hip BMD. Given that unilateral DXA measurements may underestimate the risk of osteoporosis, bilateral hip assessment is recommended whenever possible, particularly when QCT images are available for opportunistic osteoporosis screening.

Indexed as

Artificial intelligenceDiscrepancyFemoral anteversionGluteal muscle volumeOsteoporosisQuantitative computed tomography

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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.