December 2006

Volume 23, Issue 4

The relationship between prevalence and incidence of dental caries. Some observational consequences.

Authors: D. Holst


Objectives: To investigate the relationship between incidence and prevalence of caries. The principles are illustrated by means of Lexis diagrams, which show the relationship between cases of caries belonging to a population with a certain incidence and natural course of the disease in time. The analysis shows how studies on prevalence yield associations that reflect the determinants of the disease progression just as much as the causes of disease. Also the diagnostic criteria of the disease affect the prevalence estimate. The presence of fluoride changes the course of the disease and the prevalence estimate even with an unchanged incidence rate. This knowledge about incidence and prevalence should be taken into consideration when data from cross-sectional and time-series studies are interpreted. In an example from Norway the prevalence of caries was reduced. During the same period fluoride was made universally available, invasive treatment criteria were changed to less invasive and the time between the regular examinations were extended. These factors affect the estimates of caries made by cross-sectional recordings. Key words: Cross-sectional estimates, fluoride, incidence, prevalence, treatment criteria


Other articles in this issue

Article Pages Access
Editorial - Presentations and conferences: can we measure their value? 194-196 Download
Caries prevalence in 12-year-old children from Germany. Results of the 2004 national survey 197-202 Download
The relationship between prevalence and incidence of dental caries. Some observational consequences. 203-208 Download
Characteristics attributed to individuals with dental fluorosis 209-216 Download
DIAGNOdent - an adjunctive diagnostic method for caries diagnosis in epidemiology 217-221 Download
Prevalence and factors associated with traumatic dental injuries (TDI) to anterior teeth of 11-13 year old Thai children 222-227 Download
Performance indicators used to assess the quality of primary dental care 228-235 Download
A survey of school dental screening practise in community dental services of England and Wales in 2003 236-238 Download
The prevalence and pattern of hypodontia of the permanent teeth and crown size and shape deformity affecting upper lateral incisors in a sample of Jordanian dental patients. 239-243 Download
Relationship between dental caries experience (DMFS) and dental fluorosis in 12-year-old Puerto Ricans. 244-250 Download
Prevalence of dental caries in obese and normal-weight Brazilian adolescents attending state and private schools. 251-253 Download
Abstracts - Papers presented at the BASCD Spring Presidential meeting in Cambridge, UK, March 2006 254-254 Download


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