Abstract
Aims
Several instruments evaluate patient-reported outcomes in diabetes mellitus (DM),
but almost none are validated for use in Arabic language. The aim of this study is
to test the psychometric properties and responsiveness of the Arabic version of the
Diabetes Treatment Satisfaction Questionnaire (DTSQs) in Qatar.
Methods
Ambulatory Arabic speaking DM patients were interviewed at two consecutive time points
in Doha, Qatar. The 8-item DTSQs was administered in conjunction with the Medical
Outcomes Study 36-Item Short-Form Health Survey (SF-36) and the World Health Organization
Quality of Life Measure (WHOQOL-Bref) to assess convergent validity. Reliability was
evaluated by internal consistency and item analysis. Construct validity was evaluated
using “known groups” comparisons (including gender, insulin use, and HbA1c). Sensitivity
of DTSQs scores to the subject's metabolic conditions was determined.
Results
One hundred subjects (mean age 50.7) participated. Half (54%) were female. The majority
(93%) had Type 2 DM, but 39 (42%) were using insulin. Results revealed satisfactory
internal consistency. Metabolic measures (fasting blood glucose and AIC) had significant
inverse correlations with DTSQs scores (interview 1, Pearson's r = −0.333 and r = −0.401, respectively, p < 0.01). Scale criterion and construct validity were found to be satisfactory. Most
sub-dimensions of the SF-36 and WHOQOL-Bref were correlated with the DTSQ, indicating
a good concurrent validity. As in prior studies, women demonstrated poorer treatment
satisfaction.
Conclusions
The Qatar Arabic DTSQs version was found to be a reliable and valid instrument for
the assessment of treatment satisfaction in Arabic diabetes mellitus patients in the
country.
Keywords
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Article info
Publication history
Published online: January 21, 2016
Accepted:
December 28,
2015
Received in revised form:
October 31,
2015
Received:
September 20,
2015
Footnotes
☆This publication was made possible by an NPRP award from the Qatar National Research Fund (a member of The Qatar Foundation). The statements made herein are solely the responsibility of the authors.
Identification
Copyright
© 2016 Elsevier Ireland Ltd. Published by Elsevier Inc. All rights reserved.
