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SIC (selected countries)

Significant Caries Index
- Data for some Selected Countries -

Detailed analysis of the caries situation in many countries show that there is a skewed distribution of caries prevalence - meaning that a proportion of 12-year-olds still has high or even very high DMFT values even though a proportion is totally caries free. Clearly, the mean DMFT value does not always accurately reflect this skewed distribution leading to incorrect conclusion that the caries situation for the whole population is controlled, while in reality, several individuals still have caries.
A new index, the Significant Caries Index was introduced in order to bring attention to the individuals with the highest caries values in each population under investigation.

The Significant Caries Index is calculated as follows:

1) Individuals in the population (sample) are sorted according to their DMFT values
2) One third of the population with the highest caries scores is selected
3) The mean DMFT for this subgroup is calculated. This value is the SiC Index.


SiCIndices as presented in the tables below were calculated from either data obtained from standard surveys assisted by WHO or from published literature using comparable methods. In many cases they apply to large groups from the most populous parts of the country providing a working estimate rather than being fully representative. Sources/references are given in the table itself.

Last updated by Gisela Ladda Tayanin