{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,29]],"date-time":"2026-04-29T12:33:37Z","timestamp":1777466017728,"version":"3.51.4"},"reference-count":50,"publisher":"SAGE Publications","issue":"4","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["BMR"],"published-print":{"date-parts":[[2023,6,30]]},"abstract":"<jats:p>BACKGROUND: The population of older adults with knee osteoarthritis (OA)-related disabilities is increasing globally. However, studies regarding instrumental activities of daily living (IADL) in older adults with knee OA are limited. OBJECTIVE: This study investigated the psychological factors associated with IADL disability in older adults with moderate to severe knee OA. METHODS: A cross-sectional study was conducted on 179 patients with knee OA aged \u2a7e 65 years. The six-item short form of the Pain Catastrophizing Scale (PCS-6), the four-item short form of the Pain Self-Efficacy Questionnaire (PSEQ-4), and the fifteen-item Geriatric Depression Scale (GDS-15) were used to assess psychological factors. The participants were divided into IADL disabled and non-disabled groups. Binary logistic regression analyses were performed with the IADL disability status as the dependent variable. The PCS-6, PSEQ-4, and GDS-15 tools were included as independent variables in the logistic regression model. RESULTS: Of the 179 participants, 88 (49.1%) showed disability in conducting IADL. PSEQ-4 (odds ratio = 0.90, 95%; confidence interval = 0.82\u20130.99, p= 0.02) was a significant independent variable among all psychological factors. CONCLUSION: Even after controlling for cofounders, our study found that self-efficacy, assessed using the PSEQ-4, was related to IADL disability in older adults with moderate to severe knee OA.<\/jats:p>","DOI":"10.3233\/bmr-220197","type":"journal-article","created":{"date-parts":[[2023,3,7]],"date-time":"2023-03-07T11:23:01Z","timestamp":1678188181000},"page":"911-920","source":"Crossref","is-referenced-by-count":8,"title":["Psychological factors associated with instrumental activities of daily living disability in older adults with moderate to severe knee osteoarthritis"],"prefix":"10.1177","volume":"36","author":[{"given":"Keigo","family":"Nanjo","sequence":"first","affiliation":[{"name":"Department of Rehabilitation Medicine, Tokyo Medical and Dental University Graduate School, Tokyo, Japan"},{"name":"Department of Rehabilitation, Shonan Kamakura General Hospital, Kanagawa, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Takashi","family":"Ikeda","sequence":"additional","affiliation":[{"name":"Department of Rehabilitation Medicine, Tokyo Medical and Dental University Graduate School, Tokyo, Japan"},{"name":"School of Nursing and Rehabilitation Sciences, Showa University, Kanagawa, Japan"},{"name":"Research Institute for Sport and Exercise Sciences, Showa University, Kanagawa, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Naoko","family":"Nagashio","sequence":"additional","affiliation":[{"name":"Department of Rehabilitation, Shonan Kamakura General Hospital, Kanagawa, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Tomoko","family":"Sakai","sequence":"additional","affiliation":[{"name":"Department of Rehabilitation Medicine, Tokyo Medical and Dental University Graduate School, Tokyo, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Tetsuya","family":"Jinno","sequence":"additional","affiliation":[{"name":"Department of Orthopedic Surgery, Dokkyo Medical University Saitama Medical Center, Saitama, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"179","reference":[{"issue":"9783","key":"10.3233\/BMR-220197_ref1","doi-asserted-by":"crossref","first-page":"2115","DOI":"10.1016\/S0140-6736(11)60243-2","article-title":"Osteoarthritis: An update with relevance for clinical practice","volume":"377","author":"Bijlsma","year":"2011","journal-title":"Lancet."},{"issue":"3","key":"10.3233\/BMR-220197_ref3","doi-asserted-by":"crossref","first-page":"179","DOI":"10.1093\/geront\/9.3_Part_1.179","article-title":"Assessment of older people: self-maintaining and instrumental activities of daily living","volume":"9","author":"Lawton","year":"1969","journal-title":"Gerontologist."},{"key":"10.3233\/BMR-220197_ref4","doi-asserted-by":"crossref","first-page":"914","DOI":"10.1001\/jama.1963.03060120024016","article-title":"Studies of illness in the aged. 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