dmft | R Documentation |
Count data from a dental epidemiological study for evaluation of various programs for reducing caries collected among school children from an urban area of Belo Horizonte (Brazil).
data("dmft")
A data frame with 797 observations on the following 5 variables.
Number of decayed, missing or filled teeth at the end of the study.
Number of decayed, missing or filled teeth at the beginning of the study.
A factor with levels male
and female
.
A factor with levels brown
, white
and black
.
A factor with levels control
, educ
, enrich
,
rinse
, hygiene
and all
.
The aim of the caries prevention study was to compare four methods to prevent dental caries. Interventions were carried out according to the following scheme:
Control group
Oral health education
Enrichment of the school diet with rice bran
Mouthwash with 0.2% sodium floride (NaF) solution
Oral hygiene
All four methods together
D. Boehning, E. Dietz, P. Schlattmann, L. Mendonca and U. Kirchner. The zero-inflated Poisson model and the decayed, missing and filled teeth index in dental epidemiology. Journal of the Royal Statistical Society A, 162(2), 195–209, 1999.
data("dmft", package = "flexmix")
dmft_flx <- initFlexmix(End ~ 1, data = dmft, k = 2,
model = FLXMRglmfix(family = "poisson",
fixed = ~ Gender + Ethnic + Treatment))
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.