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An evaluation of Knutson's formula for estimating age‐specific DMF teeth
Author(s) -
Korts David C.,
Poulsen Sven,
Kingman Albert
Publication year - 1978
Publication title -
community dentistry and oral epidemiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.061
H-Index - 101
eISSN - 1600-0528
pISSN - 0301-5661
DOI - 10.1111/j.1600-0528.1978.tb01148.x
Subject(s) - medicine , age groups , dentistry , population , statistics , orthodontics , demography , mathematics , environmental health , sociology
The present study evaluated a formula suggested by Knutson for obtaining an age‐specific estimate of mean DMFT in a population on the basis of the age‐specific percentage of individuals with 1 or more DMFT. A total of 149 previously collected age‐specific data sets from low‐fluoride areas in the U.S.A. were used, and the two parameters K and B were estimated using the method of weighted least squares. The analysis showed that the formula could be used with good accuracy for certain restrictions of age (5–11 years) and percentage of individuals with 1 or more DMFT ( 70 %).