PMID: 11913305Mar 27, 2002Paper

A graphic display for the presentation of site-wise odds ratios for score transitions to augment the traditional findings from clinical studies employing dental indexes

Compendium of Continuing Education in Dentistry
H M ProskinB J Nelson

Abstract

Many of the parameters used in clinical dental research involve the assessment of a condition at each of a number of sites within the mouth. Traditionally, such measurements are averaged over all sites within the mouth (or over all sites of a specified type) for each study participant before statistical analysis. However, a consideration of the original, site-wise scores may provide some additional insights into the performance of therapeutic modalities that might not be made evident through an application of the traditional, means-based approach. A method based on the calculation of site-wise odds ratios of certain types of baseline-to-final examination score transitions was applied to the modified gingival index data from two clinical studies performed to investigate the effect of the daily chewing of a commercially available chewing gum relative to a mint control. A graphical display of these site-specific findings was prepared, which indicated that the chewing gum regimen tended to be associated with a higher frequency of occurrence of favorable score transitions than was the mint control at several measurement sites throughout the mouth.

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