The minimum important differences for the urinary scales of the Pelvic Floor Distress Inventory and Pelvic Floor Impact Questionnaire - 13/08/11

Doi : 10.1016/j.ajog.2009.02.007

Matthew D. Barber, MD, MHS ^a, Cathie Spino, DSc ^b, Nancy K. Janz, PhD ^b, Linda Brubaker, MD, MS ^c, Ingrid Nygaard, MD ^d, Charles W. Nager, MD ^e, Thomas L. Wheeler, MD, MSPH ^f
Pelvic Floor Disorders Network
^a Obstetrics, Gynecology, and Women's Health Institute, Cleveland Clinic, Cleveland, OH
^b Data Coordinating Center, University of Michigan, Ann Arbor, MI
^c Departments of Obstetrics and Gynecology and Urology, Loyola University, Chicago, IL
^d Department of Obstetrics and Gynecology, University of Utah, Salt Lake City, UT
^e Department of Reproductive Medicine, University of California–San Diego, San Diego, CA
^f Department of Obstetrics and Gynecology, University of Alabama–Birmingham, Birmingham, AL

Résumé

Objective

We sought to estimate the minimum important difference (MID) for the Urinary Distress Inventory (UDI), UDI-stress subscale of the Pelvic Floor Distress Inventory, and Urinary Impact Questionnaire (UIQ) of the Pelvic Floor Impact Questionnaire.

Study Design

We calculated MID using anchor- and distribution-based approaches from a randomized trial for nonsurgical stress incontinence treatment. Anchors included a global impression of change, incontinence episodes from a urinary diary, and the Incontinence Severity Index. Effect size and standard error of measurement were the distribution methods used.

Results

Anchor-based MIDs ranged from -22.4 to -6.4 points for the UDI, -16.5 to -4.6 points for the UDI-stress, and -17.0 to -6.5 points for the UIQ. These data were supported by 2 distribution-based estimates.

Conclusion

Reasonable estimates of MID are 11, 8, and 16 points for the UDI, UDI-stress subscale, and UIQ, respectively. Statistically significant improvements that meet these thresholds should be considered clinically important.

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Key words : incontinence, minimum important difference, questionnaire, responsiveness, stress urinary health-related quality of life, urinary incontinence

Plan

Materials and Methods

Results

Comment

	Cite this article as: Barber MD, Spino C, Janz NK, et al. The minimum important differences for the urinary scales of the Pelvic Floor Distress Inventory and Pelvic Floor Impact Questionnaire. Am J Obstet Gynecol 2009;200:580.e1-580.e7.
	Reprints not available from the authors.
	Supported by Grants from the National Institute of Child Health and Human Development and the National Institutes of Health Office of Research on Women's Health (U01 HD41249, U10 HD41250, U10 HD41261, U10 HD41267, U10 HD54136, U10 HD54214, U10 HD54215, and U10 HD54241). This trial is registered at www.clinicaltrials.gov under registration #NCT00270998.

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Vol 200 - N° 5

P. 580.e1-580.e7 - mai 2009 Retour au numéro

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The minimum important differences for the urinary scales of the Pelvic Floor Distress Inventory and Pelvic Floor Impact Questionnaire - 13/08/11

Résumé

Objective

Study Design

Results

Conclusion

Plan

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