{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,22]],"date-time":"2026-09-22T23:27:10Z","timestamp":1790119630719,"version":"4.0.1"},"reference-count":49,"publisher":"Elsevier BV","license":[{"start":{"date-parts":[[2025,12,1]],"date-time":"2025-12-01T00:00:00Z","timestamp":1764547200000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.elsevier.com\/tdm\/userlicense\/1.0\/"},{"start":{"date-parts":[[2025,12,1]],"date-time":"2025-12-01T00:00:00Z","timestamp":1764547200000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.elsevier.com\/legal\/tdmrep-license"},{"start":{"date-parts":[[2025,12,1]],"date-time":"2025-12-01T00:00:00Z","timestamp":1764547200000},"content-version":"stm-asf","delay-in-days":0,"URL":"https:\/\/doi.org\/10.15223\/policy-017"},{"start":{"date-parts":[[2025,12,1]],"date-time":"2025-12-01T00:00:00Z","timestamp":1764547200000},"content-version":"stm-asf","delay-in-days":0,"URL":"https:\/\/doi.org\/10.15223\/policy-037"},{"start":{"date-parts":[[2025,12,1]],"date-time":"2025-12-01T00:00:00Z","timestamp":1764547200000},"content-version":"stm-asf","delay-in-days":0,"URL":"https:\/\/doi.org\/10.15223\/policy-012"},{"start":{"date-parts":[[2025,12,1]],"date-time":"2025-12-01T00:00:00Z","timestamp":1764547200000},"content-version":"stm-asf","delay-in-days":0,"URL":"https:\/\/doi.org\/10.15223\/policy-029"},{"start":{"date-parts":[[2025,12,1]],"date-time":"2025-12-01T00:00:00Z","timestamp":1764547200000},"content-version":"stm-asf","delay-in-days":0,"URL":"https:\/\/doi.org\/10.15223\/policy-004"}],"funder":[{"DOI":"10.13039\/501100001700","name":"Government of Japan Ministry of Education Culture Sports Science and Technology","doi-asserted-by":"publisher","award":["23K19663"],"award-info":[{"award-number":["23K19663"]}],"id":[{"id":"10.13039\/501100001700","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100003478","name":"Government of Japan Ministry of Health Labour and Welfare","doi-asserted-by":"publisher","award":["23AA2003"],"award-info":[{"award-number":["23AA2003"]}],"id":[{"id":"10.13039\/501100003478","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100003478","name":"Government of Japan Ministry of Health Labour and Welfare","doi-asserted-by":"publisher","award":["24AA2006"],"award-info":[{"award-number":["24AA2006"]}],"id":[{"id":"10.13039\/501100003478","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["clinicalkey.com","clinicalkey.com.au","clinicalkey.es","clinicalkey.fr","clinicalkey.jp","thekneejournal.com","elsevier.com","sciencedirect.com"],"crossmark-restriction":true},"short-container-title":["The Knee"],"published-print":{"date-parts":[[2025,12]]},"DOI":"10.1016\/j.knee.2025.07.018","type":"journal-article","created":{"date-parts":[[2025,8,12]],"date-time":"2025-08-12T12:11:17Z","timestamp":1755000677000},"page":"19-27","update-policy":"https:\/\/doi.org\/10.1016\/elsevier_cm_policy","source":"Crossref","is-referenced-by-count":6,"special_numbering":"C","title":["Patients aged 80 and above face higher critical systemic complication rates after single-stage bilateral versus unilateral total knee arthroplasty: a nationwide database analysis"],"prefix":"10.1016","volume":"57","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-7983-2878","authenticated-orcid":false,"given":"Manabu","family":"Kawata","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shotaro","family":"Aso","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ryota","family":"Yamagami","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kenichi","family":"Kono","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shuji","family":"Taketomi","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hiroki","family":"Matsui","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kiyohide","family":"Fushimi","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hideo","family":"Yasunaga","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sakae","family":"Tanaka","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"78","reference":[{"issue":"Suppl 3","key":"10.1016\/j.knee.2025.07.018_b0005","first-page":"76","article-title":"Outcomes of total and unicompartmental knee arthroplasty for secondary and spontaneous osteonecrosis of the knee","volume":"88","author":"Myers","year":"2006","journal-title":"J Bone Joint Surg Am"},{"issue":"9823","key":"10.1016\/j.knee.2025.07.018_b0010","doi-asserted-by":"crossref","first-page":"1331","DOI":"10.1016\/S0140-6736(11)60752-6","article-title":"Knee replacement","volume":"379","author":"Carr","year":"2012","journal-title":"Lancet"},{"issue":"9","key":"10.1016\/j.knee.2025.07.018_b0015","doi-asserted-by":"crossref","first-page":"2503","DOI":"10.1002\/art.39221","article-title":"Impact of total knee arthroplasty as assessed using patient-reported pain and health-related quality of life indices: rheumatoid arthritis versus osteoarthritis","volume":"67","author":"Dusad","year":"2015","journal-title":"Arthritis Rheumatol"},{"issue":"5","key":"10.1016\/j.knee.2025.07.018_b0020","doi-asserted-by":"crossref","first-page":"1198","DOI":"10.1016\/j.knee.2017.06.005","article-title":"Annual trends in knee arthroplasty and tibial osteotomy: Analysis of a national database in Japan","volume":"24","author":"Kawata","year":"2017","journal-title":"Knee"},{"issue":"5","key":"10.1016\/j.knee.2025.07.018_b0025","doi-asserted-by":"crossref","first-page":"806","DOI":"10.1080\/14397595.2016.1265705","article-title":"Total knee arthroplasty improves both knee function and disease activity in patients with rheumatoid arthritis","volume":"27","author":"Kumagai","year":"2017","journal-title":"Mod Rheumatol"},{"issue":"17","key":"10.1016\/j.knee.2025.07.018_b0030","doi-asserted-by":"crossref","first-page":"1455","DOI":"10.2106\/JBJS.17.01617","article-title":"Projected volume of primary total joint arthroplasty in the U.S., 2014 to 2030","volume":"100","author":"Sloan","year":"2018","journal-title":"J Bone Joint Surg Am"},{"issue":"12","key":"10.1016\/j.knee.2025.07.018_b0035","doi-asserted-by":"crossref","first-page":"717","DOI":"10.1136\/ard.57.12.717","article-title":"Prevalence of generalised osteoarthritis in patients with advanced hip and knee osteoarthritis: the Ulm osteoarthritis study","volume":"57","author":"Gunther","year":"1998","journal-title":"Ann Rheum Dis"},{"issue":"9","key":"10.1016\/j.knee.2025.07.018_b0040","doi-asserted-by":"crossref","first-page":"1137","DOI":"10.1016\/j.joca.2009.04.005","article-title":"Prevalence of radiographic knee osteoarthritis and its association with knee pain in the elderly of Japanese population-based cohorts: the ROAD study","volume":"17","author":"Muraki","year":"2009","journal-title":"Osteoarthritis Cartilage"},{"issue":"6","key":"10.1016\/j.knee.2025.07.018_b0045","doi-asserted-by":"crossref","first-page":"842","DOI":"10.1016\/j.arth.2010.08.016","article-title":"The risk of subsequent joint arthroplasty after primary unilateral total knee arthroplasty, a 10-year study","volume":"26","author":"Sayeed","year":"2011","journal-title":"J Arthroplasty"},{"issue":"10","key":"10.1016\/j.knee.2025.07.018_b0050","doi-asserted-by":"crossref","first-page":"1842","DOI":"10.1016\/j.arth.2012.10.008","article-title":"The fate of the remaining knee(s) or hip(s) in osteoarthritic patients undergoing a primary TKA or THA","volume":"28","author":"Shao","year":"2013","journal-title":"J Arthroplasty"},{"issue":"5","key":"10.1016\/j.knee.2025.07.018_b0055","doi-asserted-by":"crossref","first-page":"396","DOI":"10.2106\/JBJS.16.00499","article-title":"Subsequent total joint arthroplasty after primary total knee or hip arthroplasty: a 40-year population-based study","volume":"99","author":"Sanders","year":"2017","journal-title":"J Bone Joint Surg Am"},{"issue":"1","key":"10.1016\/j.knee.2025.07.018_b0060","doi-asserted-by":"crossref","first-page":"34","DOI":"10.1097\/CORR.0000000000000925","article-title":"What is the likelihood of subsequent arthroplasties after primary TKA or THA? Data from the osteoarthritis initiative","volume":"478","author":"Santana","year":"2020","journal-title":"Clin Orthop Relat Res"},{"key":"10.1016\/j.knee.2025.07.018_b0065","doi-asserted-by":"crossref","first-page":"145","DOI":"10.1097\/00003086-199512000-00022","article-title":"History of the contralateral knee after primary knee arthroplasty for osteoarthritis","volume":"321","author":"Mont","year":"1995","journal-title":"Clin Orthop Relat Res"},{"issue":"4","key":"10.1016\/j.knee.2025.07.018_b0070","doi-asserted-by":"crossref","first-page":"347","DOI":"10.1016\/0883-5403(94)90043-4","article-title":"Long-term outcomes of contralateral knees after unilateral total knee arthroplasty for osteoarthritis","volume":"9","author":"Ritter","year":"1994","journal-title":"J Arthroplasty"},{"issue":"6","key":"10.1016\/j.knee.2025.07.018_b0075","doi-asserted-by":"crossref","first-page":"1963","DOI":"10.1016\/j.knee.2020.10.017","article-title":"Same-day bilateral total knee arthroplasty: incidence and perioperative outcome trends from 2009 to 2016","volume":"27","author":"Remily","year":"2020","journal-title":"Knee"},{"issue":"6","key":"10.1016\/j.knee.2025.07.018_b0080","doi-asserted-by":"crossref","first-page":"2227","DOI":"10.1016\/j.arth.2021.01.045","article-title":"Simultaneous bilateral total knee arthroplasty is associated with shorter length of stay but increased mortality compared with staged bilateral total knee arthroplasty: a systematic review and meta-analysis","volume":"36","author":"Makaram","year":"2021","journal-title":"J Arthroplasty"},{"issue":"1","key":"10.1016\/j.knee.2025.07.018_b0085","doi-asserted-by":"crossref","DOI":"10.2106\/JBJS.RVW.22.00194","article-title":"Bilateral total knee arthroplasty: current concepts review","volume":"11","author":"Wang","year":"2023","journal-title":"JBJS Rev"},{"issue":"7","key":"10.1016\/j.knee.2025.07.018_b0090","doi-asserted-by":"crossref","first-page":"1645","DOI":"10.1016\/j.arth.2024.01.026","article-title":"The financial feasibility of bilateral total knee arthroplasty: a matched cohort analyses of revenue and contribution margin between simultaneous and staged procedures","volume":"39","author":"Ashkenazi","year":"2024","journal-title":"J Arthroplasty"},{"issue":"13","key":"10.1016\/j.knee.2025.07.018_b0095","doi-asserted-by":"crossref","first-page":"916","DOI":"10.1055\/a-2368-4516","article-title":"Comparison of the cost-effectiveness and safety between staged bilateral total knee arthroplasty and simultaneous bilateral total knee arthroplasty: a retrospective cohort study between 2001 and 2022","volume":"37","author":"Tsui","year":"2024","journal-title":"J Knee Surg"},{"issue":"1","key":"10.1016\/j.knee.2025.07.018_b0100","doi-asserted-by":"crossref","first-page":"29987","DOI":"10.1038\/s41598-024-81821-0","article-title":"Complications following bilateral simultaneous versus staged total knee arthroplasty in the Japanese population: a propensity-matched case-control study","volume":"14","author":"Matsumura","year":"2024","journal-title":"Sci Rep"},{"issue":"22","key":"10.1016\/j.knee.2025.07.018_b0105","doi-asserted-by":"crossref","DOI":"10.1097\/MD.0000000000015931","article-title":"Bilateral total knee arthroplasty: simultaneous or staged? A systematic review and meta-analysis","volume":"98","author":"Liu","year":"2019","journal-title":"Medicine (Baltimore)"},{"issue":"4","key":"10.1016\/j.knee.2025.07.018_b0110","doi-asserted-by":"crossref","first-page":"303","DOI":"10.2106\/JBJS.20.01046","article-title":"Bilateral simultaneous total knee arthroplasty may not be safe even in the healthiest patients","volume":"103","author":"Warren","year":"2021","journal-title":"J Bone Joint Surg Am"},{"issue":"14","key":"10.1016\/j.knee.2025.07.018_b0115","doi-asserted-by":"crossref","first-page":"1072","DOI":"10.2106\/JBJS.23.00112","article-title":"Complications and safety of simultaneous bilateral total knee arthroplasty: a patient characteristic and comorbidity-matched analysis","volume":"105","author":"Richardson","year":"2023","journal-title":"J Bone Joint Surg Am"},{"issue":"12","key":"10.1016\/j.knee.2025.07.018_b0120","article-title":"Mortality following simultaneous versus staged bilateral total knee arthroplasty: a systematic review and meta-analysis","volume":"15","author":"Alshaikh","year":"2023","journal-title":"Cureus"},{"key":"10.1016\/j.knee.2025.07.018_b0125","article-title":"Question: what are the contraindications for performing bilateral total knee arthroplasty under the same anesthesia?","author":"Phillips","year":"2024","journal-title":"J Arthroplasty"},{"issue":"9 Suppl","key":"10.1016\/j.knee.2025.07.018_b0130","doi-asserted-by":"crossref","first-page":"212","DOI":"10.1016\/j.arth.2016.03.018","article-title":"Bilateral simultaneous vs staged total knee arthroplasty: a comparison of complications and mortality","volume":"31","author":"Sheth","year":"2016","journal-title":"J Arthroplasty"},{"issue":"5","key":"10.1016\/j.knee.2025.07.018_b0135","doi-asserted-by":"crossref","first-page":"709","DOI":"10.1007\/s00402-019-03157-z","article-title":"Simultaneous vs staged bilateral total knee arthroplasty: a propensity-matched case-control study from nine fast-track centres","volume":"139","author":"Lindberg-Larsen","year":"2019","journal-title":"Arch Orthop Trauma Surg"},{"issue":"4","key":"10.1016\/j.knee.2025.07.018_b0140","doi-asserted-by":"crossref","DOI":"10.1371\/journal.pone.0194854","article-title":"Annual trends in arthroscopic meniscus surgery: analysis of a national database in Japan","volume":"13","author":"Kawata","year":"2018","journal-title":"PLoS One"},{"issue":"12","key":"10.1016\/j.knee.2025.07.018_b0145","doi-asserted-by":"crossref","first-page":"3699","DOI":"10.1007\/s00167-018-4958-7","article-title":"Atopic dermatitis is a novel demographic risk factor for surgical site infection after anterior cruciate ligament reconstruction","volume":"26","author":"Kawata","year":"2018","journal-title":"Knee Surg Sports Traumatol Arthrosc"},{"issue":"2","key":"10.1016\/j.knee.2025.07.018_b0150","doi-asserted-by":"crossref","first-page":"429","DOI":"10.1007\/s00167-020-05943-4","article-title":"Type of bone graft and primary diagnosis were associated with nosocomial surgical site infection after high tibial osteotomy: analysis of a national database","volume":"29","author":"Kawata","year":"2021","journal-title":"Knee Surg Sports Traumatol Arthrosc"},{"issue":"2","key":"10.1016\/j.knee.2025.07.018_b0155","doi-asserted-by":"crossref","first-page":"58","DOI":"10.37737\/ace.23008","article-title":"A review of studies using japanese nationwide administrative claims databases","volume":"5","author":"Sato","year":"2023","journal-title":"Ann Clin Epidemiol"},{"issue":"10","key":"10.1016\/j.knee.2025.07.018_b0160","doi-asserted-by":"crossref","first-page":"476","DOI":"10.1016\/j.je.2016.09.009","article-title":"Validity of diagnoses, procedures, and laboratory data in Japanese administrative data","volume":"27","author":"Yamana","year":"2017","journal-title":"J Epidemiol"},{"issue":"2","key":"10.1016\/j.knee.2025.07.018_b0165","doi-asserted-by":"crossref","first-page":"273","DOI":"10.1111\/j.1524-4733.2009.00671.x","article-title":"Use of stabilized inverse propensity scores as weights to directly estimate relative risk and its confidence intervals","volume":"13","author":"Xu","year":"2010","journal-title":"Value Health"},{"issue":"3","key":"10.1016\/j.knee.2025.07.018_b0170","doi-asserted-by":"crossref","first-page":"399","DOI":"10.1080\/00273171.2011.568786","article-title":"An introduction to propensity score methods for reducing the effects of confounding in observational studies","volume":"46","author":"Austin","year":"2011","journal-title":"Multivariate Behav Res"},{"issue":"5","key":"10.1016\/j.knee.2025.07.018_b0175","doi-asserted-by":"crossref","first-page":"844","DOI":"10.1016\/j.resinv.2024.07.010","article-title":"Safety of transbronchial lung cryobiopsy compared to transbronchial forceps biopsy in patients with diffuse lung disease: an observational study using a national database in Japan","volume":"62","author":"Awano","year":"2024","journal-title":"Respir Investig"},{"issue":"1","key":"10.1016\/j.knee.2025.07.018_b0180","doi-asserted-by":"crossref","first-page":"111","DOI":"10.1007\/s11999-013-3156-7","article-title":"Perioperative morbidity and mortality of same-day bilateral TKAs: incidence and risk factors","volume":"472","author":"Poultsides","year":"2014","journal-title":"Clin Orthop Relat Res"},{"issue":"2","key":"10.1016\/j.knee.2025.07.018_b0185","first-page":"192","article-title":"Are unilateral or staged bilateral total knee arthroplasty really safer than simultaneously bilateral TKA, or is it a myth?","volume":"84","author":"Arslan","year":"2018","journal-title":"Acta Orthop Belg"},{"key":"10.1016\/j.knee.2025.07.018_b0190","doi-asserted-by":"crossref","first-page":"151","DOI":"10.1016\/j.knee.2023.11.013","article-title":"No differences in terms of complications, readmissions, reoperations, and patient-reported outcomes in simultaneous bilateral versus staged bilateral total knee arthroplasty in selected patients","volume":"47","author":"Franceschetti","year":"2024","journal-title":"Knee"},{"issue":"6","key":"10.1016\/j.knee.2025.07.018_b0195","doi-asserted-by":"crossref","first-page":"333","DOI":"10.5604\/01.3001.0054.3271","article-title":"Is Simultaneous bilateral knee replacement a safe approach for patients with bilateral knee osteoarthritis? A prospective case-control study","volume":"25","author":"Abdalla","year":"2023","journal-title":"Ortop Traumatol Rehabil"},{"issue":"1","key":"10.1016\/j.knee.2025.07.018_b0200","doi-asserted-by":"crossref","first-page":"892","DOI":"10.1186\/s12891-024-08023-7","article-title":"Comparative study of simultaneous and staged bilateral total knee arthroplasty: is age a key factor in surgical outcomes?","volume":"25","author":"Yalin","year":"2024","journal-title":"BMC Musculoskelet Disord"},{"key":"10.1016\/j.knee.2025.07.018_b0205","article-title":"Long-term comparison safety and outcomes of simultaneous, staggered, and staged bilateral total knee arthroplasty","author":"Kim","year":"2024","journal-title":"J Arthroplasty"},{"key":"10.1016\/j.knee.2025.07.018_b0210","doi-asserted-by":"crossref","first-page":"88","DOI":"10.1016\/j.knee.2024.07.019","article-title":"Higher modified frailty index score is associated with 30-day postoperative complications following simultaneous bilateral total knee arthroplasty","volume":"50","author":"Garcia","year":"2024","journal-title":"Knee"},{"issue":"7","key":"10.1016\/j.knee.2025.07.018_b0215","doi-asserted-by":"crossref","first-page":"702","DOI":"10.1055\/s-0041-1741000","article-title":"The BTK safety score: a novel scoring system for risk stratifying patients undergoing simultaneous bilateral total knee arthroplasty","volume":"36","author":"Wang","year":"2023","journal-title":"J Knee Surg"},{"issue":"8","key":"10.1016\/j.knee.2025.07.018_b0220","doi-asserted-by":"crossref","first-page":"3591","DOI":"10.1007\/s00402-024-05435-x","article-title":"Age-adjusted Charlson comorbidity index as an effective tool for the choice between simultaneous or staged bilateral total knee arthroplasty","volume":"144","author":"Chang","year":"2024","journal-title":"Arch Orthop Trauma Surg"},{"issue":"4","key":"10.1016\/j.knee.2025.07.018_b0225","doi-asserted-by":"crossref","first-page":"657","DOI":"10.1007\/s00402-021-03841-z","article-title":"Age-adjusted Charlson comorbidity index as a novel guideline for patient selection between unilateral versus bilateral simultaneous total knee arthroplasty","volume":"142","author":"Amit","year":"2022","journal-title":"Arch Orthop Trauma Surg"},{"issue":"4","key":"10.1016\/j.knee.2025.07.018_b0230","doi-asserted-by":"crossref","first-page":"784","DOI":"10.1213\/ANE.0b013e3182282953","article-title":"Bilateral total knee arthroplasty: risk factors for major morbidity and mortality","volume":"113","author":"Memtsoudis","year":"2011","journal-title":"Anesth Analg"},{"issue":"6","key":"10.1016\/j.knee.2025.07.018_b0235","doi-asserted-by":"crossref","first-page":"1443","DOI":"10.1007\/s11999-009-0736-7","article-title":"The feasibility and perioperative complications of outpatient knee arthroplasty","volume":"467","author":"Berger","year":"2009","journal-title":"Clin Orthop Relat Res"},{"issue":"9 Suppl","key":"10.1016\/j.knee.2025.07.018_b0240","doi-asserted-by":"crossref","first-page":"197","DOI":"10.1016\/j.arth.2016.05.037","article-title":"Is outpatient arthroplasty as safe as fast-track inpatient arthroplasty? A propensity score matched analysis","volume":"31","author":"Lovecchio","year":"2016","journal-title":"J Arthroplasty"},{"key":"10.1016\/j.knee.2025.07.018_b0245","article-title":"Do outpatient knee or hip arthroplasties improve patient outcomes?","author":"Hoveidaei","year":"2024","journal-title":"J Arthroplasty"}],"container-title":["The Knee"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/api.elsevier.com\/content\/article\/PII:S0968016025001978?httpAccept=text\/xml","content-type":"text\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/api.elsevier.com\/content\/article\/PII:S0968016025001978?httpAccept=text\/plain","content-type":"text\/plain","content-version":"vor","intended-application":"text-mining"}],"deposited":{"date-parts":[[2026,3,7]],"date-time":"2026-03-07T10:17:14Z","timestamp":1772878634000},"score":1,"resource":{"primary":{"URL":"https:\/\/linkinghub.elsevier.com\/retrieve\/pii\/S0968016025001978"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2025,12]]},"references-count":49,"alternative-id":["S0968016025001978"],"URL":"https:\/\/doi.org\/10.1016\/j.knee.2025.07.018","relation":{},"ISSN":["0968-0160"],"issn-type":[{"value":"0968-0160","type":"print"}],"subject":[],"published":{"date-parts":[[2025,12]]},"assertion":[{"value":"Elsevier","name":"publisher","label":"This article is maintained by"},{"value":"Patients aged 80 and above face higher critical systemic complication rates after single-stage bilateral versus unilateral total knee arthroplasty: a nationwide database analysis","name":"articletitle","label":"Article Title"},{"value":"The Knee","name":"journaltitle","label":"Journal Title"},{"value":"https:\/\/doi.org\/10.1016\/j.knee.2025.07.018","name":"articlelink","label":"CrossRef DOI link to publisher maintained version"},{"value":"article","name":"content_type","label":"Content Type"},{"value":"\u00a9 2025 Elsevier B.V. All rights are reserved, including those for text and data mining, AI training, and similar technologies.","name":"copyright","label":"Copyright"}]}}