Portuguese validation of the Urinary Incontinence-Specific Quality-of-Life Instrument: I-QOL
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Abstract
Introduction and hypothesis
Our objective was to translate and validate a Portuguese version of the Urinary Incontinence-Specific Quality-of-Life Instrument (I-QOL), a questionnaire that is widely used in clinical trials.
Methods
Fifty patients completed the same questionnaire twice at a 2-week interval. During the first visit, we conducted a face-to-face interview and collected demographic data. The King's Health Questionnaire was completed during the same visit for comparisons.
Results
The results showed that the Portuguese version of the I-QOL has very good psychometrics properties. Reliability was assessed by Cronbach's alpha (0.93), reproducibility was calculated through the intraclass correlation coefficient (0.88), construct validity was determined by comparing the I-QOL scores and King's Health scores, and discriminant validity was calculated by comparing the total I-QOL scores with measures of gravity.
Conclusions
We conclude that the Portuguese version of the I-QOL is a very good tool for the evaluation quality-of-life in women with urinary incontinence in Portuguese-speaking countries.
Keywords
Urinary incontinence Quality-of-life Validation Questionnaire Psychometrics properties Incontinence-specific quality-of-life measurementNotes
Acknowledgments
We wish to thank Dr. Donald L. Patrick, Ph.D., MSPH, Professor, Department of Health Services, University of Washington, for his assistance and collaborative work in the development of this study.
Conflicts of interest
None.
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