Measuring Productivity Costs in Patients With Musculoskeletal Disorders: Measurement Properties of the Institute for Medical Technology Assessment Productivity Cost Questionnaire.
measurement properties
musculoskeletal disorders
productivity costs
Journal
Value in health : the journal of the International Society for Pharmacoeconomics and Outcomes Research
ISSN: 1524-4733
Titre abrégé: Value Health
Pays: United States
ID NLM: 100883818
Informations de publication
Date de publication:
12 2019
12 2019
Historique:
received:
08
03
2019
revised:
21
05
2019
accepted:
17
07
2019
entrez:
7
12
2019
pubmed:
7
12
2019
medline:
6
6
2020
Statut:
ppublish
Résumé
The Institute for Medical Technology Assessment Productivity Cost Questionnaire (iPCQ) was recently developed to cover all domains of productivity costs; absenteeism, presenteeism and productivity costs related to unpaid work. The original iPCQ has not been tested with respect to neither content or construct validity, nor reliability, and there is no Norwegian version of the questionnaire. To translate and cross-culturally adapt the iPCQ into Norwegian and to test its measurement properties among patients with musculoskeletal disorders. Translation and cross-cultural adaptation was conducted according to guidelines, and measurement properties were investigated using a cross-sectional design including a test-retest assessment. Patients with musculoskeletal disorders were recruited from secondary care. Data quality, content validity (10 patients evaluated comprehensibility, 2 researchers and 1 clinician evaluated relevance and comprehensiveness), construct validity (factor analysis, internal consistency, divergent hypothesis testing), and test-retest reliability (intraclass correlation coefficient two-way random average agreement, Cohen's unweighted kappa) were assessed. In total, 115 patients with a mean age (SD) of 46 (9) years were included, and 62 responded to the retest. The questionnaire was feasible, with little missing data and no floor or ceiling effects. Content validity displayed good comprehensibility and relevance and sufficient comprehensiveness. Factor analysis revealed a 3-component solution accounting for 82% of the total variance; items loaded as expected and supported the original structure of the iPCQ. Internal consistency was acceptable for the 3 components of productivity cost, with an inter-item correlation ranging from 0.42 to 0.62. Further, a total of 91% of our hypotheses were verified. The intraclass correlation coefficient values ranged from 0.88 to 0.99 for all items except one; kappa ranged from 0.61 to 0.92, indicating overall good reliability of the questionnaire. The Norwegian iPCQ showed good measurement properties among patients with musculoskeletal disorders from secondary care in Norway. We therefore recommend the iPCQ as a useful tool for measuring productivity costs in patients with musculoskeletal disorders.
Sections du résumé
BACKGROUND
The Institute for Medical Technology Assessment Productivity Cost Questionnaire (iPCQ) was recently developed to cover all domains of productivity costs; absenteeism, presenteeism and productivity costs related to unpaid work. The original iPCQ has not been tested with respect to neither content or construct validity, nor reliability, and there is no Norwegian version of the questionnaire.
OBJECTIVES
To translate and cross-culturally adapt the iPCQ into Norwegian and to test its measurement properties among patients with musculoskeletal disorders.
METHODS
Translation and cross-cultural adaptation was conducted according to guidelines, and measurement properties were investigated using a cross-sectional design including a test-retest assessment. Patients with musculoskeletal disorders were recruited from secondary care. Data quality, content validity (10 patients evaluated comprehensibility, 2 researchers and 1 clinician evaluated relevance and comprehensiveness), construct validity (factor analysis, internal consistency, divergent hypothesis testing), and test-retest reliability (intraclass correlation coefficient two-way random average agreement, Cohen's unweighted kappa) were assessed.
RESULTS
In total, 115 patients with a mean age (SD) of 46 (9) years were included, and 62 responded to the retest. The questionnaire was feasible, with little missing data and no floor or ceiling effects. Content validity displayed good comprehensibility and relevance and sufficient comprehensiveness. Factor analysis revealed a 3-component solution accounting for 82% of the total variance; items loaded as expected and supported the original structure of the iPCQ. Internal consistency was acceptable for the 3 components of productivity cost, with an inter-item correlation ranging from 0.42 to 0.62. Further, a total of 91% of our hypotheses were verified. The intraclass correlation coefficient values ranged from 0.88 to 0.99 for all items except one; kappa ranged from 0.61 to 0.92, indicating overall good reliability of the questionnaire.
CONCLUSIONS
The Norwegian iPCQ showed good measurement properties among patients with musculoskeletal disorders from secondary care in Norway. We therefore recommend the iPCQ as a useful tool for measuring productivity costs in patients with musculoskeletal disorders.
Identifiants
pubmed: 31806198
pii: S1098-3015(19)32307-1
doi: 10.1016/j.jval.2019.07.011
pii:
doi:
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Validation Study
Langues
eng
Sous-ensembles de citation
IM
Pagination
1410-1416Informations de copyright
Copyright © 2019 ISPOR–The Professional Society for Health Economics and Outcomes Research. Published by Elsevier Inc. All rights reserved.