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The Patient - Patient-Centered Outcomes Research
Published in: The Patient - Patient-Centered Outcomes Research 4/2014

01-12-2014 | Original Research Article

The Incontinence Impact Questionnaire-7 (IIQ-7) Can Be Applicable to Chinese Males and Females with Lower Urinary Tract Symptoms

Authors: Edmond P. H. Choi, Cindy L. K. Lam, Weng-Yee Chin

Published in: The Patient - Patient-Centered Outcomes Research | Issue 4/2014

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Abstract

Aim and Objectives

The aim of this study was to extend the scope of application of the Incontinence Impact Questionnaire-7 (IIQ-7) with the objective of assessing the applicability, validity, reliability and sensitivity of the IIQ-7 in both Chinese males and females with lower urinary tract symptoms (LUTS).

Methods

The validity, reliability and sensitivity were assessed in 233 patients who were recruited in Hong Kong primary-care settings. The internal construct validity was assessed by corrected item–total correlation. The convergent validity was assessed using Pearson’s correlation test against International Prostate Symptom Score (IPSS) quality-of-life question and Short Form 12, version 2 (SF-12v2). The reliability was assessed by the internal consistency (Cronbach’s alpha coefficient) and 2-week test–retest reliability (intraclass correlation coefficient and paired t test). The sensitivity was determined by performing known group comparisons by independent t test.

Results

Corrected item–total correlations were ≥0.4 for all items in males and females. Overall, the IIQ-7 total score had a stronger correlation with IPSS quality-of-life score than the SF-12v2. The IIQ-7 showed good internal consistency (Cronbach’s alpha coefficient >0.7) and good test–retest reliability (ICC > 0.8, paired t test p value >0.05). The IIQ-7 was more sensitive than the SF-12v2 to detect differences among patients with different levels of symptom severity.

Conclusions

The IIQ-7 Chinese version appears to be a valid and reliable measure to assess Cantonese-speaking males and females with LUTS. The IIQ-7 is more sensitive than generic health-related quality-of-life measures to detect differences between groups.
Appendix
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Metadata
Title
The Incontinence Impact Questionnaire-7 (IIQ-7) Can Be Applicable to Chinese Males and Females with Lower Urinary Tract Symptoms
Authors
Edmond P. H. Choi
Cindy L. K. Lam
Weng-Yee Chin
Publication date
01-12-2014
Publisher
Springer International Publishing
Published in
The Patient - Patient-Centered Outcomes Research / Issue 4/2014
Print ISSN: 1178-1653
Electronic ISSN: 1178-1661
DOI
https://doi.org/10.1007/s40271-014-0062-3

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