teeth {DOS2}

Smoking and Periodontal Disease.

Description

Data from NHANES 2011-2012 concerning periodonal disease in 441 matched pairs of smokers and nonsmokers.

Usage

data("teeth")

Format

A data frame with 882 observations on the following 4 variables.

mset

Matched pair indicator: 1, 2, ..., 441.

smoker

Treatment indicator: 1 if current smoker, 0 if never smoker

either4up

Measure of periodontal disease for upper teeth; see Details.

either4low

Measure of periodontal disease for lower teeth; see Details.

cigsperday

Cigarettes smoked per day. Zero for nonsmokers.

Details

Smoking is believed to cause periodontal disease; see Tomar and Asma (2000). Using more recent data from NHANES 2011-2012, the data describe 441 matched pairs of a daily smoker and a never smoker. Daily smokers smoked every day of the last 30 days. Never smokers smoked fewer than 100 cigarettes in their lives, do not smoke now, and had no tobacco use in the previous five days.

Pairs are matched for education, income, age, gender and black race.

Measurements were made for up to 28 teeth, 14 upper, 14 lower, excluding 4 wisdom teeth. Pocket depth and loss of attachment are two complementary measures of the degree to which the gums have separated from the teeth. Pocket depth and loss of attachment are measured at six locations on each tooth, providing the tooth is present. A measurement at a location was taken to exhibit disease if it had either a loss of attachement >=4mm or a pocked depth >=4mm, so each tooth contributes a score from 0 to 6. Upper and lower are the number of measurements exhibiting disease for upper and lower teeth.

This example is from Rosenbaum (2016) where more information may be found.

The data are closely related to the periodontal data set, where the outcome is univariate. The teeth data are mentioned in Section 18.9 of "Design of Observational Studies", second edition.

Source

"National Health and Nutrition Examination Survey" (NHANES), 2011-2012. cdc.gov/nchs/nhanes

References

Rosenbaum, P. R. (2016) <doi:10.1214/16-AOAS942> "Using Scheffe projections for multiple outcomes in an observational study of smoking and periondontal disease". Annals of Applied Statistics, 10, 1447-1471.

Tomar, S. L. and Asma, S. (2000) <doi:10.1902/jop.2000.71.5.743> "Smoking attributable periodontitis in the United States: Findings from NHANES III". J. Periodont. 71, 743-751.

Examples

data(teeth)
summary(teeth)
# See also the examples in the documentation for 'cohere'.