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BMC Medicine
Published in: BMC Medicine 1/2012

Open Access 01-12-2012 | Research article

Development and description of measurement properties of an instrument to assess treatment burden among patients with multiple chronic conditions

Authors: Viet-Thi Tran, Victor M Montori, David T Eton, Dan Baruch, Bruno Falissard, Philippe Ravaud

Published in: BMC Medicine | Issue 1/2012

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Abstract

Background

Patients experience an increasing treatment burden related to everything they do to take care of their health: visits to the doctor, medical tests, treatment management and lifestyle changes. This treatment burden could affect treatment adherence, quality of life and outcomes. We aimed to develop and validate an instrument for measuring treatment burden for patients with multiple chronic conditions.

Methods

Items were derived from a literature review and qualitative semistructured interviews with patients. The instrument was then validated in a sample of patients with chronic conditions recruited in hospitals and general practitioner clinics in France. Factor analysis was used to examine the questionnaire structure. Construct validity was studied by the relationships between the instrument's global score, the Treatment Satisfaction Questionnaire for Medication (TSQM) scores and the complexity of treatment as assessed by patients and physicians. Agreement between patients and physicians was appraised. Reliability was determined by a test-retest method.

Results

A sample of 502 patients completed the Treatment Burden Questionnaire (TBQ), which consisted of 7 items (2 of which had 4 subitems) defined after 22 interviews with patients. The questionnaire showed a unidimensional structure. The Cronbach's α was 0.89. The instrument's global score was negatively correlated with TSQM scores (rs = -0.41 to -0.53) and positively correlated with the complexity of treatment (rs = 0.16 to 0.40). Agreement between patients and physicians (n = 396) was weak (intraclass correlation coefficient 0.38 (95% confidence interval 0.29 to 0.47)). Reliability of the retest (n = 211 patients) was 0.76 (0.67 to 0.83).

Conclusions

This study provides the first valid and reliable instrument assessing the treatment burden for patients across any disease or treatment context. This instrument could help in the development of treatment strategies that are both efficient and acceptable for patients.
Appendix
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Metadata
Title
Development and description of measurement properties of an instrument to assess treatment burden among patients with multiple chronic conditions
Authors
Viet-Thi Tran
Victor M Montori
David T Eton
Dan Baruch
Bruno Falissard
Philippe Ravaud
Publication date
01-12-2012
Publisher
BioMed Central
Published in
BMC Medicine / Issue 1/2012
Electronic ISSN: 1741-7015
DOI
https://doi.org/10.1186/1741-7015-10-68

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