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International Urogynecology Journal
Published in: International Urogynecology Journal 7/2019

01-07-2019 | Urinary Incontinence | Original Article

Validation of the Chinese version of the Pelvic Floor Distress Inventory-20 (PFDI-20) according to the COSMIN checklist

Authors: Yidi Ma, Tao Xu, Ye Zhang, Meng Mao, Jia Kang, Lan Zhu

Published in: International Urogynecology Journal | Issue 7/2019

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Abstract

Introduction and hypothesis

The objective of this study was to translate the short version of the Pelvic Floor Distress Inventory (PFDI-20) into Chinese and to evaluate its psychometric properties in Chinese women with symptomatic pelvic floor dysfunction according to the Consensus-Based Standards for the Selection of Health Status Measurement Instruments (COSMIN) checklist.

Methods

Between October 2017 and May 2018, a cross-sectional analysis of the clinical data of 126 patients who met the inclusion criteria was performed. The patients completed the questionnaires at the baseline (T1), 1–2 weeks later (T2), and 3 months after surgery (T3). Reliability testing included internal consistency, test–retest reliability, and measurement error. The methodical tests for validity were content validity, criterion validity, construct validity, and hypothesis testing. Responsiveness was also taken into consideration.

Results

One hundred twenty-six patients completed all questionnaires. Internal consistency, measured by Cronbach’s alpha value, was good, and the test–retest reliability was high, with an intraclass correlation coefficient (ICC) of 0.99. Construct validity was verified by factor analysis. All assumptions were confirmed, and there were no ceiling or floor effects in this study. Spearman’s correlation coefficient between the PFDI-20 and the Pelvic Floor Impact Questionnaire (PFIQ-7) was 0.867, showing a significant correlation. Furthermore, the minimal important change (MIC) of 50.0 was less than the smallest detectable change (SDC) of 18.36, indicating the sufficient responsiveness.

Conclusions

The Chinese version of the PFDI-20 developed in this study is a reliable and valid instrument that provides good responsiveness to clinical changes.
Appendix
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Metadata
Title
Validation of the Chinese version of the Pelvic Floor Distress Inventory-20 (PFDI-20) according to the COSMIN checklist
Authors
Yidi Ma
Tao Xu
Ye Zhang
Meng Mao
Jia Kang
Lan Zhu
Publication date
01-07-2019
Publisher
Springer International Publishing
Published in
International Urogynecology Journal / Issue 7/2019
Print ISSN: 0937-3462
Electronic ISSN: 1433-3023
DOI
https://doi.org/10.1007/s00192-018-3847-4

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