| veneer {WWGbook} | R Documentation |
veneer data in Chapter 7
Description
The Dental Veneer data were collected by researchers at the University of Michigan Dental School, in a study investigating the impact of veneer placement on subsequent gingival (gum) health among adult patients (Ocampo, 2005).
Usage
data(veneer)Format
A data frame with 110 observations on the following 7 variables.
- patient
: Patient ID variable (Level 3 ID)
- tooth
: Tooth number (Level 2 ID)
- age
: Age of patient when veneer was placed, constant for all observations on the same patient
- base.gcf
: Baseline measure of Gingival Crevicular Fluid for the tooth, constant for all observations on the same tooth
- cda
: Average contour difference in the tooth after veneer placement, constant for all observations on the same tooth
- time
: Time points of longitudinal measures (3 = Three Months, 6 = Six Months)
- gcf
: Gingival Crevicular Fluid adjacent to the tooth, collected at each time point (Dependent Variable)
References
Ocampo, J., Data taken from M.S. Thesis, Effect of Porcelain Laminate Contour on Gingival Inflammation, University of Michigan School of Dentistry, 2005
West, B., Welch, K. & Galecki, A, Linear Mixed Models: A Practical Guide Using Statistical Software, Chapman Hall / CRC Press, first edition, 2006.
Examples
str(veneer)