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Comments on a commentary: statistical evaluation of split mouth caries trials
1Department of Biostatistics, Faculty of Health Sciences, University of Aarhus, Denmark. vaeth@biostat.aau.dk
Community Dentistry and Oral Epidemiology
|June 30, 1998
Summary
This study corrects statistical methods for split mouth caries trials, offering valid confidence intervals for effectiveness, net gain, and relative risk. These accurate calculations improve the reliability of clinical trial data analysis in dentistry.
Area of Science:
- Dental Research
- Epidemiology
- Biostatistics
Background:
- Split mouth caries trials frequently report outcomes using "effectiveness" and "net gain".
- A previous review highlighted the link between effectiveness and relative risk but used incorrect confidence intervals.
- Accurate statistical measures are crucial for interpreting dental caries trial results.
Purpose of the Study:
- To provide valid confidence intervals for "net gain", "effectiveness", and "relative risk" in split mouth caries trials.
- To correct inaccuracies in previous statistical analyses of such trial data.
- To offer practical examples for calculating these corrected confidence intervals.
Main Methods:
- The study focuses on statistical analysis of data from split mouth trials.
- It derives and presents corrected formulas for confidence intervals.
- Examples illustrate the application of these valid statistical methods.
Main Results:
- Valid confidence intervals for "net gain", "effectiveness", and "relative risk" are provided.
- The note corrects previously reported inaccurate confidence intervals.
- Demonstrated calculations show how to apply the valid methods.
Conclusions:
- The findings offer accurate statistical tools for analyzing split mouth caries trial data.
- Corrected confidence intervals enhance the reliability and interpretation of trial outcomes.
- This work supports more rigorous epidemiological analysis in dental research.