Abstract
PurposeThe aim of this study was to translate the questionnaire for urinary incontinence diagnosis (QUID) into German and to assess its psychometric properties in German-speaking women with urinary incontinence (UI). The QUID contains two subscales to measure symptom severity of stress urinary incontinence (SUI) and urge urinary incontinence (UUI) and to distinguish between both forms.MethodsA total of 161 women with UI completed the QUID and the King’s Health Questionnaire (KHQ), each in the German version. To examine construct validity Spearman’s correlation coefficients between both questionnaires were computed. Furthermore, the internal consistency (Cronbach’s alpha) of the QUID and its criterion validity were examined. Looking at criterion validity, sensitivity, specificity, ROC curves, and Youden-indexes were computed for both subscales.ResultsThe QUID showed good construct validity by strong correlations with related domains of the KHQ. Cronbach’s alpha values were good for both subscales of the QUID (SUI-subscale: 0.76; UUI-subscale: 0.86). Sensitivity and specificity were 83% (95% CI, 0.72–0.9) and 45% (95% CI, 0.25–0.67) for the SUI-subscale and 83% (95% CI, 0.7–0.91) and 56% (95% CI, 0.4–0.72) for the UUI-subscale. Youden-index was 0.28 for the SUI-subscale and 0.39 for the UUI-subscale at the given cut-off values.ConclusionPsychometric properties of the German-language QUID are principally good and support its use in the German-speaking area. However, the modest specificity when distinguishing between SUI and UUI should be taken into account.Trial registration number:DRKS00018777 (date of registration: 16-January-2020).
Highlights
Urinary incontinence (UI) is a ubiquitous issue in gynaecologic practice and puts a lot of distress on patients who are affected [1]
The original English version is recommended for use as basic diagnostic tool to distinguish between stress urinary incontinence (SUI), urge urinary incontinence (UUI), and MUI in urogynecologic practice as well as to measure patient reported outcomes within respective clinical trials [4, 1 3 Vol.:(0123456789)
Since every language area has its distinctions, it is necessary to re-validate patient questionnaires if translated what means to accurately check their psychometric properties. In this regard the following quality criteria regularly are of interest: reliability, validity, and, in case of patient questionnaires like the questionnaire for urinary incontinence diagnosis (QUID), which are supposed to discriminate between certain conditions, diagnostic accuracy [7, 8]
Summary
Urinary incontinence (UI) is a ubiquitous issue in gynaecologic practice and puts a lot of distress on patients who are affected [1]. Since every language area has its distinctions, it is necessary to re-validate patient questionnaires if translated what means to accurately check their psychometric properties. In this regard the following quality criteria regularly are of interest: reliability, validity, and, in case of patient questionnaires like the QUID, which are supposed to discriminate between certain conditions, diagnostic accuracy [7, 8]. Internal consistency indicates the extent to which several items that are supposed to measure the same dimension within a multi-item scale are related to each other. Diagnostic accuracy relates to the ability of the questionnaire to discriminate between certain conditions (e.g. two forms of UI)
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