{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,30]],"date-time":"2026-09-30T03:59:56Z","timestamp":1790740796136,"version":"4.1.0"},"reference-count":42,"publisher":"SAGE Publications","issue":"5","license":[{"start":{"date-parts":[[2025,4,24]],"date-time":"2025-04-24T00:00:00Z","timestamp":1745452800000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["Journal of Back and Musculoskeletal Rehabilitation"],"published-print":{"date-parts":[[2025,9]]},"abstract":"<jats:sec>\n                    <jats:title>Background<\/jats:title>\n                    <jats:p>Stair ascent\/descent pose significant challenges after total knee arthroplasty (TKA); however, the exact knee flexion range of motion (ROM) and quadriceps strength requirements remain unclear.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Objective<\/jats:title>\n                    <jats:p>To establish criteria for knee flexion ROM and quadriceps strength to determine independence in stair ascent\/descent and evaluate the accuracy of the combination of these factors in patients with bilateral TKA.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>Patients with bilateral TKA were cross-sectionally assessed at 1 year postoperatively for independence in stair ascent\/descent. Receiver operating characteristic curves provided cutoff values for knee flexion ROM and quadriceps strength. The area under the curves (AUC) of each factor and logistic regression models including both factors were evaluated.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>Eighty-two participants were included. Fifty-eight participants could independently ascend and 52 could descend stairs, with equal cutoff values for both: 121\u00b0 for knee flexion ROM (AUC: 0.66 and 0.67) and 1.09 Nm\/kg for quadriceps strength (AUC: 0.70 and 0.73). Logistic regression models produced AUCs of 0.73 and 0.76 for ascent and descent, respectively.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>A quadriceps strength of 1.09 Nm\/kg is a useful cutoff for independent stair ascent\/descent, but combining it with knee flexion ROM did not enhance accuracy. Other functions such as coordination of the knee or other joints may influence stair performance post-TKA.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1177\/10538127251323980","type":"journal-article","created":{"date-parts":[[2025,4,25]],"date-time":"2025-04-25T02:33:28Z","timestamp":1745548408000},"page":"1114-1124","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":3,"title":["Criteria for knee flexion range of motion and quadriceps strength to ascend and descend stairs 1 year after bilateral total knee arthroplasty: A cross-sectional study"],"prefix":"10.1177","volume":"38","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9494-5501","authenticated-orcid":false,"given":"Keigo","family":"Nanjo","sequence":"first","affiliation":[{"name":"Department of Rehabilitation, Shonan Kamakura General Hospital, \r1370-1 Okamoto, Kamakura, Kanagawa 247-8533, Japan"},{"name":"Department of Rehabilitation Medicine, Graduate School of Medical and Dental Sciences, Institute of Science Tokyo, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8510, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Takashi","family":"Ikeda","sequence":"additional","affiliation":[{"name":"Department of Rehabilitation Medicine, Graduate School of Medical and Dental Sciences, Institute of Science Tokyo, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8510, Japan"},{"name":"School of Nursing and Rehabilitation Sciences, Showa University, 1865 Tokaichibacho, Midori-ku, Yokohama, Kanagawa 226-0025, Japan"},{"name":"Research Institute for Sport and Exercise Sciences, Showa University, \r2-1-1 Fujigaoka, Aoba-ku, Yokohama, Kanagawa 227-8518, \rJapan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ryutaku","family":"Kaneyama","sequence":"additional","affiliation":[{"name":"Knee Joint Reconstruction Center, Shonan Kamakura General Hospital, 1370-1 Okamoto, Kamakura 247-8533, Kanagawa, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hiroyuki","family":"Okuyama","sequence":"additional","affiliation":[{"name":"Knee Joint Reconstruction Center, Shonan Kamakura General Hospital, 1370-1 Okamoto, Kamakura 247-8533, Kanagawa, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tomoko","family":"Sakai","sequence":"additional","affiliation":[{"name":"Department of Rehabilitation Medicine, Graduate School of Medical and Dental Sciences, Institute of Science Tokyo, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8510, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tetsuya","family":"Jinno","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery, Dokkyo Medical University Saitama Medical Center, 2-1-50 Minami-Koshigaya, Koshigaya, Saitama 343-8555, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[2025,4,24]]},"reference":[{"key":"e_1_3_4_2_2","doi-asserted-by":"publisher","DOI":"10.1016\/S0140-6736(18)32344-4"},{"key":"e_1_3_4_3_2","doi-asserted-by":"publisher","DOI":"10.3389\/fmed.2022.865412"},{"key":"e_1_3_4_4_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.apmr.2023.02.007"},{"key":"e_1_3_4_5_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.arth.2015.10.021"},{"key":"e_1_3_4_6_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.arth.2016.12.052"},{"key":"e_1_3_4_7_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.arth.2013.07.010"},{"key":"e_1_3_4_8_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.arth.2014.01.033"},{"key":"e_1_3_4_9_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.clinbiomech.2014.11.001"},{"key":"e_1_3_4_10_2","doi-asserted-by":"publisher","DOI":"10.1002\/jor.23181"},{"key":"e_1_3_4_11_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.arth.2014.03.040"},{"key":"e_1_3_4_12_2","doi-asserted-by":"publisher","DOI":"10.1007\/s11999-009-1219-6"},{"key":"e_1_3_4_13_2","doi-asserted-by":"publisher","DOI":"10.1007\/s00167-019-05554-8"},{"key":"e_1_3_4_14_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.knee.2021.11.009"},{"key":"e_1_3_4_15_2","doi-asserted-by":"publisher","DOI":"10.3233\/BMR-130422"},{"key":"e_1_3_4_16_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.joca.2013.05.002"},{"key":"e_1_3_4_17_2","first-page":"1533","article-title":"Preoperative quadriceps strength predicts functional ability one year after total knee arthroplasty","volume":"32","author":"Mizner RL","year":"2005","unstructured":"Mizner RL, Petterson SC, Stevens JE, et al. 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