ArticleActa orthopaedica2020
The neck-shaft angle: an update on reference values and associated factors.
Article in Acta orthopaedica, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT04600024 (The Importance of Pelvic Morphometric Measurements in Piriformis Syndrome), which is not on this map. Cited by 31 papers, 1 of them a synthesis that pooled 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.
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.
The Importance of Pelvic Morphometric Measurements in Piriformis Syndrome: A Case-control Study
Who cites it
31 citing papers in PubMed, 1 synthesis or guideline pooled it.
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- Computational mechanobiological model combining epiphyseal, apophyseal, and appositional growth and inner bone remodeling of the juvenile femur.Biomedical engineering online · 2026Article
- The Distribution of Caput-Collum-Diaphyseal (CCD) Angles in the Iranian Elderly Population: Implications for Proximal Femoral Nail Design.The archives of bone and joint surgery · 2026Article
- Accuracy of femoral head center reconstruction using a straight cementless rectangular stem: AnJournal of orthopaedics · 2025Article
- No proportional relationship between shape and size of the femoral canal and the external proximal femur morphology in elderly patients.Journal of orthopaedics · 2025Article
- Smartphone-based digital templating using presentation software enhances accuracy in equalizing leg length and femoral offset during bipolar hemiarthroplasty for femoral neck fracture.Archives of orthopaedic and trauma surgery · 2025Article
- New insights on femoral head trabecular bone directionality in elderly humans using a micro-CT-based analysis.Scientific reports · 2025Article
- Are there associations between bone turnover and hip geometry in the general population?Osteoporosis and sarcopenia · 2025Article
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- Influence of hip morphology on gluteal muscle biomechanics: a computational modeling study.BMC musculoskeletal disorders · 2025Article
- Parametrized statistical appearance and shape modelling strategy to predict proximal and diaphyseal femoral fractures.Frontiers in bioengineering and biotechnology · 2025Article
- Development of Local Software for Automatic Measurement of Geometric Parameters in the Proximal Femur Using a Combination of a Deep Learning Approach and an Active Shape Model on X-ray Images.Journal of imaging informatics in medicine · 2024Article
- Are there associations between hip geometry and bone quality? An analysis on 3074 adults from a general population.Archives of orthopaedic and trauma surgery · 2024Article
- Digital measurement and clinical significance of proximal femur in the older people of Inner Mongolia population, China.BMC geriatrics · 2023Article
- Sex differences in linear bone measurements occur following puberty but do not influence femoral or tibial torsion.Scientific reports · 2023Article
- [Progress in diagnosis and hip arthroscopic treatment of borderline developmental dysplasia of hip with Cam-type femoroacetabular impingement].Zhongguo xiu fu chong jian wai ke za zhi = Zhongguo xiufu chongjian waike zazhi = Chinese journal of reparative and reconstructive surgery · 2023Article
Corrections and comments
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Authors and funding
10 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Background and purpose - The neck-shaft angle (NSA) is valuable for diagnostics and therapy of the hip, but current reference values derive mostly from studies on anatomic specimens, small cohorts, or are hospital-based. Moreover, associated factors such as age, sex, or anthropometric data have rarely been considered. Therefore, we determined associated factors for NSA and reassessed the historical reference values in a general adult population.Methods - NSAs on both sides of 3,226 volunteers from the population-based Study of Health in Pomerania (SHIP) were measured with MRI. SHIP drew a representative sample of the population of Pomerania (northeastern Germany). NSAs were compared with sex, age, and anthropometric data by bivariable linear regression models. Reference values were assessed by quantile regressions for 2.5th and 97.5th percentiles.Results - The mean NSA was 127° (SD 7), while men had a lower NSA than women (95% confidence interval [CI] 0.4°-1.4°). The reference range was 114°-140°. Age was inversely associated with NSA (CI -0.2 to -0.1). Body height was positively associated with the NSA, while BMI and waist circumference showed a negative association. There was no association between body weight and NSA.Interpretation - The historical lower limit of 120° might be too high, so the radiological prevalence of hip pathology might have been overestimated. The previously reported influence of age, sex, and body height on the NSA has been confirmed.
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