{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,11,6]],"date-time":"2026-11-06T23:44:13Z","timestamp":1794008653067,"version":"4.8.0"},"reference-count":38,"publisher":"Oxford University Press (OUP)","issue":"4","license":[{"start":{"date-parts":[[2020,1,16]],"date-time":"2020-01-16T00:00:00Z","timestamp":1579132800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/academic.oup.com\/journals\/pages\/open_access\/funder_policies\/chorus\/standard_publication_model"}],"funder":[{"DOI":"10.13039\/501100009729","name":"Norwegian Fund for Post-Graduate Training in Physiotherapy","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100009729","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2020,4,17]]},"abstract":"<jats:title>Abstract<\/jats:title>\n               <jats:sec>\n                  <jats:title>Background<\/jats:title>\n                  <jats:p>Maintenance or improvement of physical function is an important treatment target in the management of patients with axial spondyloarthritis (axSpA); measurement tools that can detect changes in physical function are therefore important.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Objectives<\/jats:title>\n                  <jats:p>The objective of this study was to compare responsiveness and interpretability of the patient-reported Bath Ankylosing Spondylitis Functional Index (BASFI) and the Ankylosing Spondylitis Performed-Based Improvement (ASPI) in measuring change in physical function after exercise in patients with axSpA.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Design<\/jats:title>\n                  <jats:p>This was a sub-study of 58 patients nested within a randomized controlled trial comparing the effect of 12 weeks of exercise with usual care.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Methods<\/jats:title>\n                  <jats:p>Responsiveness and interpretability were assessed according to the Consensus-based Standards for the selection of health status Measurement Instrument. Responsiveness was assessed by testing 8 predefined hypotheses for ASPI and BASFI. Interpretability was assessed by: (1) using patients\u2019 reported change as an anchor (\u201ca little better\u201d = minimal important change) and (2) by categorizing patients with a 20% improvement as responders.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Results<\/jats:title>\n                  <jats:p>For ASPI and BASFI, 5 of 8 (63%) versus 2 of 8 (25%) of the predefined hypotheses for responsiveness were confirmed. The minimal important change values for improvement in physical function were 3.7\u00a0seconds in ASPI and 0.8 points (on a scale from 0 to 10) for BASFI. In the intervention group, 21 of 30 (70%) and 13 of 30 (43%) of the patients were categorized as responders measured with ASPI and BASFI, respectively. There was a tendency towards a floor effect in BASFI, as 8 of 58 (14%) patients scored the lowest value at baseline.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Limitations<\/jats:title>\n                  <jats:p>This study was limited by its moderate sample size.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Conclusions<\/jats:title>\n                  <jats:p>Our findings suggest that ASPI is preferable over BASFI when evaluating physical function after exercise interventions in patients with axSpA.<\/jats:p>\n               <\/jats:sec>","DOI":"10.1093\/ptj\/pzaa004","type":"journal-article","created":{"date-parts":[[2020,1,5]],"date-time":"2020-01-05T20:06:40Z","timestamp":1578254800000},"page":"728-738","source":"Crossref","is-referenced-by-count":6,"title":["Responsiveness and Interpretability of 2 Measures of Physical Function in Patients With Spondyloarthritis"],"prefix":"10.1093","volume":"100","author":[{"given":"Camilla","family":"Fongen","sequence":"first","affiliation":[{"name":"Department of Rheumatology, National Advisory Unit on Rehabilitation in Rheumatology , Diakonhjemmet Hospital, Oslo, Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hanne","family":"Dagfinrud","sequence":"additional","affiliation":[{"name":"Department of Rheumatology, National Advisory Unit on Rehabilitation in Rheumatology , Diakonhjemmet Hospital"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Annelie","family":"Bilberg","sequence":"additional","affiliation":[{"name":"Institute of Neuroscience and Physiology, Section of Health and Rehabilitation , Physiotherapy, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden, and Department of Physiotherapy, Sahlgrenska University Hospital, Gothenburg, Sweden"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Elisabeth","family":"Pedersen","sequence":"additional","affiliation":[{"name":"Department of Rheumatology, University Hospital of North Norway , Troms\u00f8, Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Melissa Woll","family":"Johansen","sequence":"additional","affiliation":[{"name":"Department of Rheumatology, Martina Hansens Hospital , B\u00e6rum, Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Salima","family":"van Weely","sequence":"additional","affiliation":[{"name":"Department of Orthopaedics, Rehabilitation and Physical Therapy , Leiden University Medical Center, Leiden, the Netherlands"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"K\u00e5re Birger","family":"Hagen","sequence":"additional","affiliation":[{"name":"Department of Rheumatology, National Advisory Unit on Rehabilitation in Rheumatology , Diakonhjemmet Hospital"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Silje Halvorsen","family":"Sveaas","sequence":"additional","affiliation":[{"name":"Department of Rheumatology, National Advisory Unit on Rehabilitation in Rheumatology , Diakonhjemmet Hospital, PO Box 23 Vinderen, 0319 Oslo, Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"286","published-online":{"date-parts":[[2020,1,16]]},"reference":[{"key":"2023011708474199300_ref1","doi-asserted-by":"crossref","first-page":"73","DOI":"10.1016\/S0140-6736(16)31591-4","article-title":"Axial spondyloarthritis","volume":"390","author":"Sieper","year":"2017","journal-title":"Lancet."},{"key":"2023011708474199300_ref2","doi-asserted-by":"crossref","first-page":"978","DOI":"10.1136\/annrheumdis-2016-210770","article-title":"2016 Update of the ASAS-EULAR management recommendations for axial spondyloarthritis","volume":"76","author":"Heijde","year":"2017","journal-title":"Ann Rheum 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