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Statistical issues for combining multiple caries diagnostics for demonstrating caries efficacy.

B P Katz1, E Huntington

  • 1Division of Biostatistics, Indiana University School of Medicine, 1050 Wishard Blvd, RG 4101, Indianapolis, IN 46260, USA. bkatz@iupui.edu

Journal of Dental Research
|August 3, 2004
PubMed
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This study compared methods for analyzing multiple dental caries diagnostic measures in clinical trials. All evaluated methods showed good performance, but ease of use and interpretability are key for selecting a consensus approach.

Area of Science:

  • Dentistry
  • Clinical Trials
  • Diagnostic Methods

Background:

  • Traditional caries diagnosis relies on visual exams, Fiber Optic Transillumination (FOTI), and radiography.
  • Newer techniques offer quantitative, continuous caries measurements instead of ordinal classifications.

Purpose of the Study:

  • To evaluate various analytical methods for multiple outcomes in dental caries clinical trials.
  • To compare the utility of these methods using real-world trial data.

Main Methods:

  • Analysis of one-year follow-up data from 1063 children in a caries trial.
  • Evaluation of four global tests (rank sum, OLS, GLS, GEE) and two caries indices (average, maximum).
  • Development and assessment of a novel hybrid analysis method.

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Main Results:

  • All tested analytical methods performed effectively when diagnostic measures indicated caries differences consistently.
  • No single method emerged as universally superior without considering practical factors.

Conclusions:

  • The choice of analytical method for multiple caries diagnostic measures requires consideration of ease of use, interpretability, and statistical assumptions.
  • Further consensus is needed to establish a standardized approach for analyzing complex caries trial data.