ArticleJournal of experimental orthopaedics2025
Normative values of radiographic parameters in coronal plane lower limb alignment in a general Japanese population: A cross-sectional study in the Iwaki cohort.
Article in Journal of experimental orthopaedics, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
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7 citing papers in PubMed.
- Multifactorial contributors to knee osteoarthritis identified by Machine Learning and Bayesian network analysis: A cross-sectional study of the Iwaki Health Promotion Project.Osteoarthritis and cartilage open · 2026Article
- Medial meniscus extrusion during gait identifies altered knee mechanical loading in early osteoarthritis of the knee.Journal of experimental orthopaedics · 2026Article
- Second-Look Arthroscopy Revealing Cartilage Coverage Following Arthroscopic Synovectomy in Severe Hemophilic Arthropathy of the Knee: A Case Report.Clinical case reports · 2026Article
- Quantitative analysis of bony and soft tissue contributions to varus deformity across knee osteoarthritis stages.Journal of experimental orthopaedics · 2026Article
- Sex-specific patterns and limited bilateral symmetry in coronal knee alignment: Insights from the modified coronal plane alignment of the knee classification.Osteoarthritis and cartilage open · 2026Article
- Age-related varus progression of femoral bowing and its related factors in the Iwaki cohort study.Journal of experimental orthopaedics · 2025Article
- Normative values of radiographic parameters in coronal plane lower limb alignment in a general Japanese population: A cross-sectional study in the Iwaki cohort.Journal of experimental orthopaedics · 2025Article
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Abstract
Purpose: The purpose of this study was to estimate normative values of radiographic parameters in lower limb alignment and investigate age-related changes in lower limb alignment in a general Japanese population. Methods: A total of 1474 knees in 737 volunteers (307 men and 430 women) who participated in the Iwaki cohort study were enroled. Standing anterior-posterior radiographs were assessed using the Kellgren-Lawrence (KL) grading scale, with KL ≥Grade 2 defined as osteoarthritis (OA). Radiographic parameters measured included the hip-knee-ankle angle (HKAA), femorotibial angle (FTA), mechanical lateral distal femoral angle (mLDFA), medial proximal tibial angle (MPTA), joint line convergence angle (JLCA) and weight-bearing line ratio (WBLR). Normative values were estimated as the mean ± 2 standard deviations for all participants without knee OA (KOA) aged 18-39 years, and associations with age were analyzed. Results: Normative values in overall young healthy participants were: HKAA, 1.8 ± 5.1°; FTA, 175.7 ± 6.5°; mLDFA, 86.4 ± 3.4°; MPTA, 85.8 ± 4.1°; JLCA, 1.2 ± 2.7° and WBLR, 39.7 ± 23.7%. The HKAA, FTA, MPTA and WBLR values differed significantly between sexes. In men without KOA, HKAA, FTA, MPTA and WBLR values correlated very weakly with age ( Conclusions: Estimated normative values of radiographic parameters in coronal plane lower limb alignment differed significantly between sexes. These data might be useful when considering the aetiology and therapeutic strategy for KOA. Level of Evidence: Level II.
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