{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,14]],"date-time":"2026-10-14T07:44:53Z","timestamp":1791963893251,"version":"4.3.4"},"reference-count":26,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2026,10,13]],"date-time":"2026-10-13T00:00:00Z","timestamp":1791849600000},"content-version":"vor","delay-in-days":285,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2026,1,1]],"date-time":"2026-01-01T00:00:00Z","timestamp":1767225600000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"funder":[{"DOI":"10.13039\/501100000272","name":"National Institute for Health and Care Research","doi-asserted-by":"publisher","award":["NIHR128334"],"award-info":[{"award-number":["NIHR128334"]}],"id":[{"id":"10.13039\/501100000272","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Journal of Aging Research"],"published-print":{"date-parts":[[2026,1]]},"abstract":"<jats:sec>\n                    <jats:title>Background<\/jats:title>\n                    <jats:p>Clinical research often relies on in\u2010person assessments, which can limit participation among frailer older adults who have difficulty attending clinical settings. Developing valid self\u2010reported alternatives could improve inclusivity. We aimed to validate self\u2010reported gait speed and grip strength against objective measures in adults aged \u2265\u200965 with mild frailty participating in the HomeHealth trial.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>Participants with paired subjective and objective gait speed and\/or grip strength measures were included. Internal consistency was assessed using Cronbach\u2019s alpha for gait speed (4 items) and grip strength (2 items), stratified by sex. Criterion validity was evaluated using sensitivity and specificity of self\u2010reported measures to identify frailty (Fried phenotype thresholds). Construct validity was examined through regression analyses with instrumental activities of daily living and quality of life outcomes.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      A total of 254 participants were included (161 females, 93 males). Sensitivity and specificity for detecting slow gait speed were 65.5% and 65.8% in men and 79.5% and 59.0% in women. For weak grip strength, sensitivity and specificity were 23.0% and 66.7% in men and 49.3% and 93.3% in women. Internal consistency was low (\n                      <jats:italic>\u03b1<\/jats:italic>\n                      \u2009=\u20090.314\u20130.574 across measures). Construct validity was moderate, with expected associations observed for functional and quality of life outcomes.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>Self\u2010reported gait speed and grip strength measures demonstrated limited validity compared with objective assessments in older adults with mild frailty and should be used cautiously as substitutes for measuring weakness and slowness in this population.<\/jats:p>\n                    <jats:p>\n                      <jats:bold>Trial Registration:<\/jats:bold>\n                      ISRCTN Registry: ISRCTN54268283\n                    <\/jats:p>\n                  <\/jats:sec>","DOI":"10.1155\/jare\/1775375","type":"journal-article","created":{"date-parts":[[2026,10,14]],"date-time":"2026-10-14T06:48:57Z","timestamp":1791960537000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Validation of Self\u2010Reported Gait Speed and Grip Strength Measures With Objective Measures in Older Adults With Mild Frailty in England"],"prefix":"10.1155","volume":"2026","author":[{"ORCID":"https:\/\/orcid.org\/0009-0008-0618-4548","authenticated-orcid":false,"given":"Zhengyi","family":"Chen","sequence":"first","affiliation":[{"name":"Research Department of Primary Care and Population Health University College London  London UK  ucl.ac.uk"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6330-7059","authenticated-orcid":false,"given":"Tasmin","family":"Rookes","sequence":"additional","affiliation":[{"name":"Research Department of Primary Care and Population Health University College London  London UK  ucl.ac.uk"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2173-2430","authenticated-orcid":false,"given":"Kate","family":"Walters","sequence":"additional","affiliation":[{"name":"Research Department of Primary Care and Population Health University College London  London UK  ucl.ac.uk"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3523-0052","authenticated-orcid":false,"given":"Rachael","family":"Frost","sequence":"additional","affiliation":[{"name":"Department of Public and Allied Health Liverpool John Moores University  Liverpool UK  ljmu.ac.uk"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0009-3817-0244","authenticated-orcid":false,"given":"Sarah","family":"Kalwarowsky","sequence":"additional","affiliation":[{"name":"Research Department of Primary Care and Population Health University College London  London UK  ucl.ac.uk"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9973-1131","authenticated-orcid":false,"given":"Louise","family":"Marston","sequence":"additional","affiliation":[{"name":"Research Department of Primary Care and Population Health University College London  London UK  ucl.ac.uk"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2026,10,13]]},"reference":[{"key":"e_1_2_11_1_2","doi-asserted-by":"publisher","DOI":"10.1093\/AGEING\/AFAA219"},{"key":"e_1_2_11_2_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.jamda.2016.09.010"},{"key":"e_1_2_11_3_2","doi-asserted-by":"publisher","DOI":"10.1519\/JPT.0000000000000097"},{"key":"e_1_2_11_4_2","doi-asserted-by":"publisher","DOI":"10.1093\/gerona\/56.3.m146"},{"key":"e_1_2_11_5_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.arr.2015.04.001"},{"key":"e_1_2_11_6_2","doi-asserted-by":"publisher","DOI":"10.1007\/s41999-020-00337-8"},{"key":"e_1_2_11_7_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.archger.2017.11.009"},{"key":"e_1_2_11_8_2","doi-asserted-by":"crossref","unstructured":"BossuytP. 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