{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,4]],"date-time":"2026-05-04T07:41:50Z","timestamp":1777880510346,"version":"3.51.4"},"reference-count":32,"publisher":"SAGE Publications","issue":"9","license":[{"start":{"date-parts":[[2023,9,1]],"date-time":"2023-09-01T00:00:00Z","timestamp":1693526400000},"content-version":"unspecified","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["Orthopaedic Journal of Sports Medicine"],"published-print":{"date-parts":[[2023,9]]},"abstract":"<jats:sec>\n                    <jats:title>Background:<\/jats:title>\n                    <jats:p>Poor postoperative quadriceps muscle strength recovery after anterior cruciate ligament reconstruction (ACLR) leads to delayed return to sports and lower patient satisfaction.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Purpose\/Hypothesis:<\/jats:title>\n                    <jats:p>The purpose of this study was to examine factors that affect quadriceps muscle strength 1 year after ACLR. It was hypothesized that older age, poor preoperative quadriceps muscle strength, and residual pain would be risk factors for poor quadriceps muscle strength recovery.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Study Design:<\/jats:title>\n                    <jats:p>Case-control study; Level of evidence, 3.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods:<\/jats:title>\n                    <jats:p>Included were patients from multiple institutions who underwent primary ACLR using autologous hamstring tendon grafts between August 1, 2013, and March 31, 2018, and who had at least 1\u2009year of follow-up data. Patients with past ligamentous injuries in the affected knee, previous injuries or operations in the contralateral knee, accompanying ligament injuries of grade 2 or 3, or inflammatory or other types of osteoarthritis were excluded. Patients were categorized as having muscle strength \u226580% (good strength recovery) or &lt;80% (poor strength recovery) compared with the contralateral leg at 1\u2009year postoperatively. Multivariate logistic regression analysis was performed to investigate the factors influencing postoperative quadriceps muscle strength. In addition, a categorical analysis was conducted based on factors extracted by the multivariate logistic regression analysis.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results:<\/jats:title>\n                    <jats:p>A total of 402 patients were included. Multivariate logistic regression analysis revealed that age at surgery ( P\u2009=\u2009.020), preoperative quadriceps muscle strength ( P\u2009=\u2009.006), and postoperative Knee injury and Osteoarthritis Outcome Score (KOOS)-Pain score ( P\u2009=\u2009.002) were significantly associated with quadriceps muscle strength at 1\u2009year postoperatively. The odds of poor muscle strength recovery according to categorical analysis were 5.0-fold higher for patients aged &gt;40 versus \u226420\u2009years, 4.2-fold higher for those with preoperative quadriceps muscle index &lt;60% versus \u226580%, and 7.7-fold higher for those with a postoperative KOOS-Pain score of &lt;85 versus 100.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion:<\/jats:title>\n                    <jats:p>Older age, poor preoperative quadriceps muscle strength, and low postoperative KOOS-Pain score were risk factors for poor quadriceps muscle strength 1\u2009year after primary ACLR. Surgical indications, including age, preoperative active rehabilitation, and pain control, should be considered for optimization of postoperative quadriceps muscle strength recovery.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1177\/23259671231194593","type":"journal-article","created":{"date-parts":[[2023,9,7]],"date-time":"2023-09-07T14:25:00Z","timestamp":1694096700000},"update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":5,"title":["Older Age, Poor Preoperative Quadriceps Muscle Strength, and Residual Pain as Risk Factors for Poor Quadriceps Muscle Strength Recovery at 1 Year After ACL Reconstruction: A TMDU MAKS Study of 402 Patients"],"prefix":"10.1177","volume":"11","author":[{"given":"Shoichi","family":"Hasegawa","sequence":"first","affiliation":[{"name":"Department of Joint Surgery and Sports Medicine, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yusuke","family":"Nakagawa","sequence":"additional","affiliation":[{"name":"Department of Joint Surgery and Sports Medicine, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan"},{"name":"Department of Orthopaedic Surgery, Tokyo Medical and Dental University Hospital, Tokyo, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Aritoshi","family":"Yoshihara","sequence":"additional","affiliation":[{"name":"Department of Joint Surgery and Sports Medicine, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan"},{"name":"Department of Orthopaedic Surgery, Tokyo Medical and Dental University Hospital, Tokyo, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Tomomasa","family":"Nakamura","sequence":"additional","affiliation":[{"name":"Department of Joint Surgery and Sports Medicine, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan"},{"name":"Department of Orthopaedic Surgery, Tokyo Medical and Dental University Hospital, Tokyo, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hiroki","family":"Katagiri","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery, Tokyo Medical and Dental University Hospital, Tokyo, Japan"},{"name":"Department of Orthopaedic Surgery, Dokkyo Medical University Saitama Medical Center, Koshigaya, Saitama, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Masaya","family":"Hayashi","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery, Kawaguchi Kogyo General Hospital, Kawaguchi, Saitama, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hideya","family":"Yoshimura","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery, Kawaguchi Kogyo General Hospital, Kawaguchi, Saitama, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Tsuyoshi","family":"Nagase","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery, Doai Memorial Hospital, Tokyo, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ichiro","family":"Sekiya","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery, Tokyo Medical and Dental University Hospital, Tokyo, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hideyuki","family":"Koga","sequence":"additional","affiliation":[{"name":"Department of Joint Surgery and Sports Medicine, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan"},{"name":"Department of Orthopaedic Surgery, Tokyo Medical and Dental University Hospital, Tokyo, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"179","published-online":{"date-parts":[[2023,9,7]]},"reference":[{"key":"bibr1-23259671231194593","doi-asserted-by":"publisher","DOI":"10.1186\/s12891-019-2499-y"},{"issue":"1","key":"bibr2-23259671231194593","first-page":"23","volume":"15","author":"Asano H","year":"2002","journal-title":"J Knee Surg"},{"key":"bibr3-23259671231194593","doi-asserted-by":"publisher","DOI":"10.1177\/2325967114561737"},{"key":"bibr4-23259671231194593","doi-asserted-by":"publisher","DOI":"10.1007\/s00167-003-0368-5"},{"key":"bibr5-23259671231194593","doi-asserted-by":"publisher","DOI":"10.1016\/j.arthro.2006.08.024"},{"key":"bibr6-23259671231194593","doi-asserted-by":"publisher","DOI":"10.1136\/bjsm.2008.057059"},{"key":"bibr7-23259671231194593","doi-asserted-by":"publisher","DOI":"10.1007\/s00590-013-1248-4"},{"key":"bibr8-23259671231194593","doi-asserted-by":"publisher","DOI":"10.1007\/s00167-003-0486-0"},{"key":"bibr9-23259671231194593","doi-asserted-by":"publisher","DOI":"10.1007\/s00590-019-02479-3"},{"key":"bibr10-23259671231194593","doi-asserted-by":"publisher","DOI":"10.1177\/03635465020300011801"},{"key":"bibr11-23259671231194593","doi-asserted-by":"publisher","DOI":"10.1007\/s00167-011-1633-7"},{"key":"bibr12-23259671231194593","doi-asserted-by":"publisher","DOI":"10.1007\/s00590-019-02580-7"},{"key":"bibr13-23259671231194593","doi-asserted-by":"publisher","DOI":"10.1038\/bmt.2012.244"},{"key":"bibr14-23259671231194593","doi-asserted-by":"publisher","DOI":"10.1016\/S0736-0266(02)00160-2"},{"key":"bibr15-23259671231194593","doi-asserted-by":"publisher","DOI":"10.1007\/s00264-003-0502-5"},{"key":"bibr16-23259671231194593","doi-asserted-by":"publisher","DOI":"10.1016\/j.arthro.2020.08.012"},{"key":"bibr17-23259671231194593","doi-asserted-by":"publisher","DOI":"10.1007\/s00167-006-0165-z"},{"key":"bibr18-23259671231194593","doi-asserted-by":"publisher","DOI":"10.1177\/1941738108326700"},{"key":"bibr19-23259671231194593","doi-asserted-by":"publisher","DOI":"10.1016\/j.knee.2006.01.005"},{"key":"bibr20-23259671231194593","doi-asserted-by":"publisher","DOI":"10.1007\/s001670000143"},{"key":"bibr21-23259671231194593","doi-asserted-by":"publisher","DOI":"10.1055\/s-2007-972836"},{"key":"bibr22-23259671231194593","doi-asserted-by":"publisher","DOI":"10.1177\/03635465000280060301"},{"key":"bibr23-23259671231194593","doi-asserted-by":"publisher","DOI":"10.2519\/jospt.1998.28.1.23"},{"key":"bibr24-23259671231194593","doi-asserted-by":"publisher","DOI":"10.2519\/jospt.1999.29.7.400"},{"key":"bibr25-23259671231194593","doi-asserted-by":"publisher","DOI":"10.1177\/0363546503262171"},{"key":"bibr26-23259671231194593","doi-asserted-by":"publisher","DOI":"10.2106\/00004623-199508000-00004"},{"key":"bibr27-23259671231194593","doi-asserted-by":"publisher","DOI":"10.1007\/s00167-005-0708-8"},{"key":"bibr28-23259671231194593","doi-asserted-by":"publisher","DOI":"10.1007\/s00167-016-4296-6"},{"key":"bibr29-23259671231194593","doi-asserted-by":"publisher","DOI":"10.1007\/s00167-009-1027-2"},{"key":"bibr30-23259671231194593","doi-asserted-by":"publisher","DOI":"10.1097\/BLO.0b013e31802ba45c"},{"issue":"2","key":"bibr31-23259671231194593","first-page":"99","volume":"36","author":"Zelle BA","journal-title":"Sports Med. 2006"},{"key":"bibr32-23259671231194593","doi-asserted-by":"publisher","DOI":"10.1177\/0363546515591258"}],"container-title":["Orthopaedic Journal of Sports Medicine"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/journals.sagepub.com\/doi\/pdf\/10.1177\/23259671231194593","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/journals.sagepub.com\/doi\/full-xml\/10.1177\/23259671231194593","content-type":"application\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/journals.sagepub.com\/doi\/pdf\/10.1177\/23259671231194593","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,5,1]],"date-time":"2026-05-01T00:13:48Z","timestamp":1777594428000},"score":1,"resource":{"primary":{"URL":"https:\/\/journals.sagepub.com\/doi\/10.1177\/23259671231194593"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2023,9]]},"references-count":32,"journal-issue":{"issue":"9","published-print":{"date-parts":[[2023,9,1]]}},"alternative-id":["10.1177\/23259671231194593"],"URL":"https:\/\/doi.org\/10.1177\/23259671231194593","relation":{},"ISSN":["2325-9671","2325-9671"],"issn-type":[{"value":"2325-9671","type":"print"},{"value":"2325-9671","type":"electronic"}],"subject":[],"published":{"date-parts":[[2023,9]]},"article-number":"23259671231194593"}}