Abstract
Objective
To develop and validate a self-reporting questionnaire assessing the burden of exercise
therapy for patients with chronic conditions.
Design
Measurement properties of an instrument.
Setting
Outpatient clinics and tertiary care hospital.
Participants
Patients (N=201) with at least 1 chronic condition and performing exercise therapy.
Interventions
Not applicable.
Main Outcome Measures
The dimensional structure of the questionnaire was assessed by principal component
analysis. Construct validity of the instrument was assessed by exploring convergent
validity with the Treatment Burden Questionnaire (TBQ) and divergent validity with
pain, self-efficacy, treatment satisfaction, and health state. Reliability was assessed
with the Cronbach α coefficient, a test-retest method using the intraclass correlation
coefficient (ICC), and Bland-Altman plotting.
Results
A preliminary list of items was developed from semistructured interviews with 28 patients
and reviewed by 2 expert physicians. Items obtained were reduced. Then a sample of
163 patients was used to measure the psychometrics of the Exercise Therapy Burden
Questionnaire (ETBQ), consisting of 10 items. Principal component analysis extracted
1 dimension. The Cronbach α was .86 (.82–.89). Test-retest reliability (n=24 patients)
was good with an ICC of .93 (.85–.97), and Bland-Altman analysis did not reveal a
systematic trend. The ETBQ showed expected convergent validity with the TBQ (ρ=.52)
and expected divergent validity with pain (ρ=.37), self-efficacy (ρ=−.34), treatment
satisfaction (ρ=−.49), and perceived health state (ρ=−.28).
Conclusions
The ETBQ is the first questionnaire assessing exercise therapy burden in patients
with chronic conditions. Its psychometric properties are promising.
Keywords
List of abbreviations:
EQ-5D (European Quality of Life–5 Dimensions), ETBQ (Exercise Therapy Burden Questionnaire), ICC (intraclass correlation coefficient), TBQ (Treatment Burden Questionnaire)To read this article in full you will need to make a payment
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Article info
Publication history
Published online: April 17, 2017
Footnotes
Disclosures: none.
Identification
Copyright
© 2017 by the American Congress of Rehabilitation Medicine
