{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,18]],"date-time":"2026-09-18T19:06:39Z","timestamp":1789758399442,"version":"4.0.1"},"reference-count":43,"publisher":"Wiley","issue":"4","license":[{"start":{"date-parts":[[2026,9,18]],"date-time":"2026-09-18T00:00:00Z","timestamp":1789689600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"},{"start":{"date-parts":[[2026,9,18]],"date-time":"2026-09-18T00:00:00Z","timestamp":1789689600000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Physiotherapy Res Intl"],"published-print":{"date-parts":[[2026,10]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Background and Purpose<\/jats:title>\n                    <jats:p>The properties of the Stair Climb Test (SCT) remain to be determined in patients with knee osteoarthritis. Thus, this study aimed to evaluate the responsiveness and clinically meaningful improvement of the SCT across different follow\u2010up periods and baseline severity in patients with knee osteoarthritis.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>\n                      A prospective longitudinal observational study was conducted. Fifty\u2010six adults with knee osteoarthritis (63.8\u00a0\u00b1\u00a010.6\u00a0y; 52% women) were included. Participants were stratified according to baseline WOMAC score into mild (&lt;\u00a030 points;\n                      <jats:italic>n<\/jats:italic>\n                      \u00a0=\u00a029) and severe (\u2265\u00a030 points;\n                      <jats:italic>n<\/jats:italic>\n                      \u00a0=\u00a027) groups. Patients participated in a 32\u2010week home\u2010based exercise program including progressive strengthening and balance exercises performed three times per week. SCT and 30STS were assessed. Responsiveness was quantified using the standardized response mean (SRM) during the early (0\u20138\u00a0weeks), late (8\u201332\u00a0weeks), and overall (0\u201332\u00a0weeks) follow\u2010up periods. Clinically meaningful improvement was evaluated using an anchor\u2010based approach, with responders defined as participants achieving an increase of\u00a0\u2265\u00a02 repetitions on the 30STS. Receiver operating characteristic analyses were used to estimate preliminary anchor\u2010derived thresholds for meaningful functional change and to assess discriminative ability.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>The SCT showed numerically higher responsiveness estimates during the early follow\u2010up period in participants with higher baseline disability (SRM\u00a0=\u00a0\u22120.59), while the corresponding estimate in the mild group was lower (SRM\u00a0=\u00a0\u22120.46). Numerically lower responsiveness estimates were observed during the late follow\u2010up period (SRM\u00a0=\u00a00.10 and \u22120.33 for severe and mild groups, respectively). The 30STS showed relatively consistent SRM estimates across follow\u2010up periods (SRM range: 0.26\u20130.62). The SCT showed poor discriminative ability during the early phase (AUC\u00a0=\u00a00.54; 95% CI: 0.38\u20130.70), whereas discrimination was numerically higher during the late phase (AUC\u00a0=\u00a00.64; 95% CI: 0.48\u20130.79). A preliminary anchor\u2010derived threshold for meaningful functional change of \u22121.6\u00a0seconds identified during the late phase was associated with higher odds of responder classification according to the 30STS anchor (OR\u00a0=\u00a02.6).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>The responsiveness and clinical interpretability of the SCT may vary according to the follow\u2010up period and baseline severity in knee osteoarthritis.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1002\/pri.70348","type":"journal-article","created":{"date-parts":[[2026,9,18]],"date-time":"2026-09-18T18:09:59Z","timestamp":1789754999000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Responsiveness of the Stair Climb Test Across Follow\u2010Up Periods and Baseline Severity in Knee Osteoarthritis"],"prefix":"10.1002","volume":"31","author":[{"given":"Borja","family":"Tronchoni\u2010Crespo","sequence":"first","affiliation":[{"name":"Clinimetry and Technological Development in Therapeutic Exercise Research Group (CLIDET), Department of Physiotherapy University of Valencia  Valencia Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jos\u00e9","family":"P\u00e9rez\u2010Maletzki","sequence":"additional","affiliation":[{"name":"Clinimetry and Technological Development in Therapeutic Exercise Research Group (CLIDET), Department of Physiotherapy University of Valencia  Valencia Spain"},{"name":"Group of Physiotherapy in the Ageing Processes: Social and Health\u2010Care Strategies, Departament de Fisioter\u00e0pia Universitat de Val\u00e8ncia  Valencia Spain"},{"name":"Departamento de Fisioterapia Universidad Europea de Valencia  Valencia 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