TY - JOUR
T1 - The ankylosing spondylitis performance index
T2 - Reliability and feasibility of an objective test for physical functioning
AU - van Bentum, Rianne E
AU - Ibañez Vodnizza, Sebastian E
AU - de la Fuente, Maria P Poblete
AU - Valenzuela Aldridge, Francisca
AU - Navarro-Compán, Victoria
AU - Rusman, Tamara R
AU - Ter Wee, Marieke M
AU - Valenzuela Letelier, Omar
AU - van Weely, Salima F E
AU - van der Horst-Bruinsma, Irene E
N1 - Funding Information: The authors acknowledge the ASAS for financial support for this project, the Chilean patient foundation Espondilitis Chile for assistance with patient recruitment, and Jesus Portal (JP), Luis Orlando Benavides Narvaez (LOBN), Maja Haanskorf (MH), and Francien de Groot (FdG) for their participation in the ASPI translation procedure. Funding Information: This work was supported by the Assessment of SpondyloArthritis international Society (ASAS; ASAS grant 2018/2019). 1R.E. van Bentum, MD, T.R. Rusman,MSc, I.E. van der Horst-Bruinsma, MD, PhD, Professor, Department of Rheumatology, Amsterdam University Medical Centre, Vrije Universiteit, Amsterdam, the Netherlands; 2S.E. Ibáñez Vodnizza, MD, M.P. Poblete de la Fuente, MD, F. Valenzuela Aldridge, MD, O. Valenzuela Letelier, MD, Department of Rheumatology, Clínica Alemana -UDD Medicine Faculty, Santiago, Chile; 3V. Navarro-Compán, MD, PhD, Department of Rheumatology, University Hospital La Paz, IdiPaz, Madrid, Spain; 4M.M. ter Wee, PhD, Department of Rheumatology, Amsterdam University Medical Centre, Vrije Universiteit, and Department of Epidemiology & Biostatistics, Amsterdam Public Health, Amsterdam University Medical Centre, Vrije Universiteit, Amsterdam; 5S.F. van Weely, PhD, Department of Orthopedics, Rehabilitation and Physical Therapy, Leiden University Medical Centre, Leiden, the Netherlands. Address correspondence to Prof. I.E. van der Horst-Bruinsma, Amsterdam University Medical Center, location VUmc, Department of Rheumatology, De Boelelaan 1117, Postal Code 1081 HV Amsterdam, Amsterdam, the Netherlands. Email: ie.vanderhorst@amsterdamumc.nl. Accepted for publication January 21, 2020. Publisher Copyright: Copyright © 2020. All rights reserved. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2020/10/1
Y1 - 2020/10/1
N2 - OBJECTIVE: Physical function in axial spondyloarthritis patients (axSpA) is currently evaluated through questionnaires. The Ankylosing Spondylitis Performance Index (ASPI) is a performance-based measure for physical functioning, which has been validated in Dutch patients with radiographic (r-)axSpA. The inter-rater reliability was not yet determined. This study is the first to evaluate the validity, reliability and feasibility of the ASPI in another patient population, including both radiographic- and non-radiographic axSpA patients.METHODS: AxSpA patients were recruited from Rheumatology clinics in Santiago, Chile. Dutch instructions were translated to Spanish via a forward-backward procedure. Study visits were performed at baseline and 1-4 weeks later. Four ASPI observers were involved, measuring the performance times of the three ASPI tests. Validity was assessed through a patient questionnaire (NRS 0-10: ≥6 'sufficient'). For reliability, intra class correlation (ICC) coefficients were calculated (with 95% CI). Correlations between the ASPI and disease parameters were tested with regression analyses.RESULTS: Sixty-eight patients were included (57% male, 52% r-axSpA). All patients understood the Spanish instructions and considered the ASPI to reach its aim (84%) and representativeness (85%) for physical functioning. The overall inter-rater- (n=62) and test-retest (n=39) reliability (ICC) of the three tests combined were 0.93 (0.88-0.96) and 0.94 (0.87-0.97), respectively. Eighty-two percent of the patients completed all tests and 94% finished <15 minutes (feasibility).CONCLUSION: This study demonstrated a high validity and feasibility in an entirely different population, with both r- and nr-axSpA. The inter-rater- and test-retest reliability was excellent. The ASPI instructions are now available for Spanish-speaking patients.
AB - OBJECTIVE: Physical function in axial spondyloarthritis patients (axSpA) is currently evaluated through questionnaires. The Ankylosing Spondylitis Performance Index (ASPI) is a performance-based measure for physical functioning, which has been validated in Dutch patients with radiographic (r-)axSpA. The inter-rater reliability was not yet determined. This study is the first to evaluate the validity, reliability and feasibility of the ASPI in another patient population, including both radiographic- and non-radiographic axSpA patients.METHODS: AxSpA patients were recruited from Rheumatology clinics in Santiago, Chile. Dutch instructions were translated to Spanish via a forward-backward procedure. Study visits were performed at baseline and 1-4 weeks later. Four ASPI observers were involved, measuring the performance times of the three ASPI tests. Validity was assessed through a patient questionnaire (NRS 0-10: ≥6 'sufficient'). For reliability, intra class correlation (ICC) coefficients were calculated (with 95% CI). Correlations between the ASPI and disease parameters were tested with regression analyses.RESULTS: Sixty-eight patients were included (57% male, 52% r-axSpA). All patients understood the Spanish instructions and considered the ASPI to reach its aim (84%) and representativeness (85%) for physical functioning. The overall inter-rater- (n=62) and test-retest (n=39) reliability (ICC) of the three tests combined were 0.93 (0.88-0.96) and 0.94 (0.87-0.97), respectively. Eighty-two percent of the patients completed all tests and 94% finished <15 minutes (feasibility).CONCLUSION: This study demonstrated a high validity and feasibility in an entirely different population, with both r- and nr-axSpA. The inter-rater- and test-retest reliability was excellent. The ASPI instructions are now available for Spanish-speaking patients.
KW - Ankylosing spondylitis
KW - Physical functional performance
KW - Spondyloarthritis
UR - http://www.scopus.com/inward/record.url?scp=85092312730&partnerID=8YFLogxK
U2 - https://doi.org/10.3899/jrheum.191063
DO - https://doi.org/10.3899/jrheum.191063
M3 - Article
C2 - 32007935
SN - 0315-162X
VL - 47
SP - 1475
EP - 1482
JO - The Journal of rheumatology
JF - The Journal of rheumatology
IS - 10
ER -