ArticleInternational orthopaedics2026
Factors associated with achieving knee flexion around one hundred and twenty five degrees and numerical rating scale around one at one year after posterior cruciate-retaining total knee arthroplasty.
Article in International orthopaedics, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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Who cites it
2 citing papers in PubMed.
- Japanese Orthopaedic Association and Societe Internationale de Chirugie Orthopedique et Tramatologie: Celebrating one hundred years of friendship and scientific exchange.International orthopaedics · 2026Article
- A brief story of Japanese orthopaedics: from the ancestral origins in Kyushu and Nara to the foundation of the Japanese orthopedic association in Tokyo.International orthopaedics · 2026Article
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3 authors.
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Abstract
purposeTo investigate factors associated with achieving both postoperative knee flexion range of motion (ROM) ≥ 125° and Numerical Rating Scale (NRS) pain score ≤ 1 at one year after posterior cruciate-retaining total knee arthroplasty (CR-TKA).
methodsThis retrospective cohort study included 100 patients who underwent CR-TKA between 2018 and 2021. Patients were divided into a good outcome group (G group; n = 43), defined as achieving both postoperative one year knee flexion ROM ≥ 125° and NRS ≤ 1, and a non-good outcome group (NG group; n = 57). Baseline demographic and clinical variables, including age, sex, operative side, body mass index (BMI), preoperative ROM, preoperative NRS, Oxford Knee Score (OKS), and surgical technique, were compared between groups. Univariate analysis and multivariable logistic regression analysis were performed to identify factors associated with favourable postoperative outcomes. Receiver operating characteristic (ROC) curve analysis was conducted to evaluate the discriminative ability of BMI.
resultsIn the univariate analysis, BMI was significantly lower in the G group than in the NG group (24.54 ± 3.50 vs. 26.35 ± 3.90 kg/m
conclusionLower BMI was associated with achieving both good knee flexion and pain-free recovery at one year after CR-TKA. However, because the discriminative ability of BMI alone was modest and residual confounding cannot be excluded, BMI should be interpreted as one associated factor rather than a standalone predictor of postoperative success.
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