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Evaluation of intra-individual test–re-test variability of uroflowmetry in healthy women and women suffering from stress, urge, and mixed urinary incontinence

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Abstract

Introduction and hypothesis

The objective was to evaluate the intra-individual variability of uroflowmetry (UFM) in healthy control subjects and women suffering from stress, urge, and mixed urinary incontinence.

Methods

A total of 35 healthy controls (group A) and 105 women suffering from urinary incontinence were enrolled in the study. Thirty-five women suffered from stress urinary incontinence (group B), 35 women suffered from mixed urinary incontinence (group C), and 35 women with overactive bladder both dry and wet (group D). All participants were asked to perform UFM measurement three times. The following parameters were analyzed: voided volume (VV), peak flow (Qmax), average flow (Qave), volume-corrected peak flow cQmax (cQmax = Qmax/2√ VV), volume-corrected average flow (cQave = Qave/2√ VV), and postvoid residual volume (PVR).

Statistical analysis was performed using the analysis of variance on repeated measurements. Relative error was calculated using variation coefficients reported as a percentage of the average. All descriptive characteristics were reported as means ± standard deviation (SD). p values ≤0.05 were considered statistically significant.

Results

No statistically significant intra-individual difference in any of the recorded parameters was identified among the three UFM recordings in groups A, C, and D. The intra-individual variability of the following parameters reached statistical significance in patients suffering from stress urinary incontinence (group B): Qmax (p = 0.0016), Qave (p = 0.0005), and cQave (p = 0.0389). A significant difference was only observed in comparison between the first and second consecutive recordings.

Conclusions

This study provides evidence supporting the high yield and good intra-individual reproducibility of UFM.

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Acknowledgements

The authors thank Josef Tvrdik, University of Ostrava, Department of Computer Science, for the statistical analysis.

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Authors and Affiliations

  1. Department of Urology, University Hospital, 17. listopadu 1790, 708 52, Ostrava, Poruba, Czech Republic

    Libor Lunacek, Jan Krhut, David Mika & Radek Sykora

  2. Department of Surgical Studies, Ostrava University, Ostrava, Czech Republic

    Libor Lunacek, Jan Krhut, David Mika & Radek Sykora

  3. Department of Obstetrics and Gynecology, University Hospital, Ostrava, Czech Republic

    Marcel Gärtner

  4. Department of Surgery, University of Southern Denmark, Odense, Denmark

    Peter Zvara

  5. Department of Urology, University of Southern Denmark, Odense, Denmark

    Peter Zvara

  6. Biomedical Laboratory, University of Southern Denmark, Odense, Denmark

    Peter Zvara

Authors
  1. Libor Lunacek
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  2. Marcel Gärtner
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  3. Jan Krhut
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  4. David Mika
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Correspondence to Jan Krhut.

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Lunacek, L., Gärtner, M., Krhut, J. et al. Evaluation of intra-individual test–re-test variability of uroflowmetry in healthy women and women suffering from stress, urge, and mixed urinary incontinence. Int Urogynecol J 29, 1523–1527 (2018). https://doi.org/10.1007/s00192-018-3571-0

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  • DOI: https://doi.org/10.1007/s00192-018-3571-0

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