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Shortening the xerostomia inventory.

William Murray Thomson1, Gert-Jan van der Putten, Cees de Baat

  • 1Sir John Walsh Research Institute, School of Dentistry, University of Otago, Dunedin, New Zealand. murray.thomson@otago.ac.nz

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Summary

The Summated Xerostomia Inventory-Dutch Version is a valid tool for assessing dry mouth symptoms in older adults across multiple countries. This research confirms its reliability for clinical and epidemiological studies.

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Area of Science:

  • Gerontology
  • Oral Health Research
  • Psychometrics

Background:

  • Xerostomia, or dry mouth, is a common complaint among older adults.
  • Accurate measurement of xerostomia symptoms is crucial for clinical and epidemiological research.

Purpose of the Study:

  • To evaluate the validity and psychometric properties of the Summated Xerostomia Inventory-Dutch Version.
  • To assess the tool's performance in diverse international populations.

Main Methods:

  • Cross-sectional study design.
  • Inclusion of six samples of older adults from the Netherlands, Australia, Japan, and New Zealand.
  • Analysis using the Summated Xerostomia Inventory-Dutch Version.

Main Results:

  • A single factor explained approximately 50% of the variance across all datasets.
  • Cronbach's alpha values were consistently at or above 0.70, indicating good internal consistency.
  • The inventory scores showed a statistically significant gradient when compared to a gold-standard xerostomia question, correlating with symptom severity.

Conclusions:

  • The Summated Xerostomia Inventory-Dutch Version demonstrates validity for measuring xerostomia symptoms.
  • The tool is suitable for use in both clinical practice and large-scale epidemiological research.