Practice abstract
British Dental Journal 193, 435 - 440 (2002)
Published online: 26 October 2002 | doi:10.1038/sj.bdj.4801591
Further statistics in dentistry Part 2: Research designs 2
A Petrie1, J S Bulman2 & J F Osborn3
- The distinction between observational and experimental studies
- The use of the relative risk in a cohort study and the odds ratio in a case-control study
- A description of parallel, matched and cross-over designs
- The choice of observational unit
Further statistics in dentistry:
- Research designs 1
- Research designs 2
- Clinical trials 1
- Clinical trials 2
- Diagnostic tests for oral conditions
- Multiple linear regression
- Repeated measures
- Systematic reviews and meta-analyses
- Bayesian statistics
- Sherlock Holmes, evidence and evidence-based dentistry
Abstract
To facilitate statistical discussion, it is essential to have an understanding of factors, effects, interactions, confounding, bias, estimation and hypothesis testing, to name but a few terms commonly used in statistical investigations in dentistry. These terms were explained in the previous paper in this series. This second paper is concerned with describing and differentiating between the various research designs that may be adopted.
- Senior Lecturer in Statistics, Eastman Dental Institute for Oral Health Care Sciences, University College London
- Honorary Reader in Dental Public Health, Eastman Dental Institute for Oral Health Care Sciences, University College London
- Professor of Epidemiological Methods, University of Rome, La Sapienza
Correspondence to: A Petrie1
Senior Lecturer in Statistics, Biostatistics Unit, Eastman Dental Institute for Oral Health Care Sciences, University College London, 256 Gray's Inn Road, London WC1X 8LD
e-mail: a.petrie@eastman.ucl.ac.uk