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Responsiveness and Interpretability of 2 Measures of Physical Function in Patients With Spondyloarthritis.

Artikel i vetenskaplig tidskrift
Författare Camilla Fongen
Hanne Dagfinrud
Annelie Bilberg
Elisabeth Pedersen
Melissa Woll Johansen
Salima van Weely
Kåre Birger Hagen
Silje Halvorsen Sveaas
Publicerad i Physical therapy
Volym 100
Nummer/häfte 4
Sidor 728-738
ISSN 1538-6724
Publiceringsår 2020
Publicerad vid Institutionen för neurovetenskap och fysiologi, sektionen för hälsa och rehabilitering
Sidor 728-738
Språk en
Länkar dx.doi.org/10.1093/ptj/pzaa004
www.ncbi.nlm.nih.gov/entrez/query.f...
Ämneskategorier Sjukgymnastik

Sammanfattning

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.The objective of this study was to compare responsiveness and interpretability of the patient reported Bath Ankylosing Spondylitis (AS) Functional Index (BASFI) and the AS performed based Improvement (ASPI) in measuring change in physical function after exercise in patients with axSpA.This was a sub-study of 58 patients nested within a randomized controlled trial comparing the effect of 12-weeks exercise with usual care.Responsiveness and interpretability was assessed according to the Consensus-based Standards for the selection of health status Measurement Instrument (COSMIN). Responsiveness was assessed by testing eight predefined hypotheses for ASPI and BASFI. Interpretability was assessed by (1) using patients' reported change as an anchor ("a little better" = minimal important change [MIC]) and (2) by categorizing patients with a 20% improvement as responders.For ASPI and BASFI; 5 of 8 (63%) vs. 2 of 8 (25%), of the predefined hypotheses for responsiveness were confirmed. The MIC values for improvement in physical function were 3.7 sec in ASPI and 0.8 points (on a scale from 0-10) 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.This study was limited by its moderate sample size.Our findings suggest that ASPI is preferable over BASFI when evaluating physical function after exercise interventions in patients with axSpA.

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Utskriftsdatum: 2020-07-11