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Responsiveness and interpretability of incontinence severity scores and FIQL in patients with fecal incontinence: a secondary analysis from a randomized controlled trial

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Abstract

Introduction and hypothesis

This study aims to assess the responsiveness and interpretability of the Vaizey score, Wexner score, and the Fecal Incontinence Quality of Life Scale (FIQL) for use in the evaluation of patients with fecal incontinence (FI).

Methods

Eighty patients with FI with a mean age of 59.3 (SD ± 11.9) were enrolled in a randomized controlled trial. The patient-reported outcomes were tested for internal and external responsiveness, longitudinal construct validity, and interpretability.

Results

All total scores proved to have both adequate to excellent responsiveness and longitudinal construct validity, and changes were in agreement with subjective improvement. Due to variability in minimally important change estimates (Vaizey score −5 to −3, Wexner score −3 to −2, FIQL 1.1 to 1.2), they should be used as indicators. All patient-reported outcomes showed psychometric or practical limitations.

Conclusions

The instruments available to date to evaluate severity and quality of life in FI do not yet attain the highest levels of psychometric soundness. As the focus of patients may differ from that of physicians, it is recommended that several measures should be included for evaluation. So far, there are suggestions that the Wexner score is most suitable for severity assessment and the FIQL for evaluating quality of life.

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Abbreviations

MIC:

Minimally important change

FIQL:

Fecal Incontinence Quality of Life Scale

FI:

Fecal incontinence

SRM:

Standardized response mean

QOL:

Quality of life

PRO:

Patient-reported outcome

SD:

Standard deviation

GPE:

Global perceived effect

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Bols, E.M.J., Hendriks, H.J.M., Berghmans, L.C.M. et al. Responsiveness and interpretability of incontinence severity scores and FIQL in patients with fecal incontinence: a secondary analysis from a randomized controlled trial. Int Urogynecol J 24, 469–478 (2013). https://doi.org/10.1007/s00192-012-1886-9

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  • DOI: https://doi.org/10.1007/s00192-012-1886-9

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