Validation of the Ankylosing Spondylitis Quality of Life assessment tool in patients with non-radiographic axial spondyloarthritis

Autor: Bengt Hoepken, Daniel Serrano, Kristina Harris, Mark C. Hwang, John D. Reveille
Rok vydání: 2020
Předmět:
Adult
Male
medicine.medical_specialty
Psychometrics
Ankylosing Spondylitis
Concurrent validity
Population
Article
Classical test theory
Young Adult
03 medical and health sciences
0302 clinical medicine
Double-Blind Method
Outcome Assessment
Health Care
Spondylarthritis
Item response theory
Humans
Medicine
Spondylitis
Ankylosing
ASQoL
Axial spondyloarthritis
Non-radiographic axial spondyloarthritis
030212 general & internal medicine
education
Reliability (statistics)
Aged
030203 arthritis & rheumatology
Ankylosing spondylitis
education.field_of_study
Patient-reported outcomes
business.industry
Public Health
Environmental and Occupational Health
Reproducibility of Results
Middle Aged
medicine.disease
Ankylosing Spondylitis Quality of Life
Exploratory factor analysis
Quality of Life
Physical therapy
Female
business
Zdroj: Quality of Life Research
ISSN: 1573-2649
0962-9343
0108-7762
DOI: 10.1007/s11136-020-02686-0
Popis: Purpose To evaluate the psychometric performance of the Ankylosing Spondylitis Quality of Life (ASQoL) scale in patients with non-radiographic axial spondyloarthritis (nr-axSpA) to assess its appropriateness as an outcome measure in future clinical studies. Methods Patients with active axSpA from a Phase III, randomized, double-blind, placebo-controlled trial (RAPID-axSpA, NCT01087762) were included (N = 325). Modified New York (mNY) classification criteria were used to classify patients as having ankylosing spondylitis or nr-axSpA; those with nr-axSpA were further categorized based on objective signs of inflammation. Psychometric properties of the ASQoL were assessed/documented using a mixture of modern psychometric methods and classical test theory methods. These included exploratory factor analysis and item response theory models to assess the domain structure, test the utility of a single domain relative to subdomains, assess bias, and generate statistics to guide an empirical scoring algorithm. The reliability and validity of scores were evaluated via internal consistency, test–retest reliability, concurrent validity, and known-groups validity. Score responsiveness was assessed via anchor-based clinically meaningful change, supplemented with empirical cumulative distribution function visualizations. Results The ASQoL data were defined by four domains. However, a four-domain solution was found to be inferior to a bifactor solution in which the four domains were included within a total domain. Scoring statistics supported a unit-weighted total score. Within the nr-axSpA population with objective signs of inflammation, the ASQoL mean score had adequate reliability, validity, and ability to detect clinically meaningful change. Conclusions Our findings suggest that the ASQoL is an appropriate outcome measure in interventional clinical trials in patients with nr-axSpA.
Databáze: OpenAIRE
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