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Related Experiment Videos

Construct validity of the incontinence severity index.

Miles Murphy1, Patrick J Culligan, Cristina M Arce

  • 1University of Louisville HSC, Louisville, Kentucky, USA. milesmurphy@comcast.net

Neurourology and Urodynamics
|May 3, 2006
PubMed
Summary

The Incontinence Severity Index (ISI) demonstrates strong construct validity in women with stress incontinence, showing high correlation with quality of life measures post-treatment and sensitivity to change.

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Area of Science:

  • Urogynecology
  • Pelvic Floor Disorders
  • Health Outcomes Research

Background:

  • Urodynamic stress incontinence significantly impacts women's quality of life.
  • Validated instruments are crucial for assessing treatment efficacy and patient-reported outcomes.

Purpose of the Study:

  • To evaluate the construct validity of the Incontinence Severity Index (ISI).
  • To assess the correlation of the ISI with the Urogenital Distress Inventory (UDI-6) and Incontinence Impact Questionnaire (IIQ-7).

Main Methods:

  • 170 women with urodynamic stress incontinence completed the ISI, UDI-6, and IIQ-7 pre- and post-surgery.
  • Spearman's rho correlation was used to analyze pre- and post-treatment scores and percent change.
  • Convergent and divergent validity were assessed through correlation analysis.

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Main Results:

  • Pre-treatment ISI scores showed weak correlation with UDI-6 and IIQ-7 (r < 0.40).
  • Post-treatment ISI scores highly correlated with UDI-6 and IIQ-7 (r's > 0.70, P < 0.001).
  • ISI demonstrated strongest correlation with UDI-6 stress symptoms subscale.

Conclusions:

  • The ISI exhibits strong construct validity in women with stress incontinence.
  • High post-treatment correlation supports convergent validity; lower correlation with obstructive subscales supports divergent validity.
  • The ISI is sensitive to treatment-induced changes in women with stress incontinence.