cd4 {covBM}

Serial CD4 counts in children with HIV.

Description

Dataset used in Data Analysis Using Regression and Multilevel/Hierarchical Models by Andrew Gelman and Jennifer Hill (Cambridge University Press, 2006). Rows with missing values of 'CD4CNT', 'visage' or 'baseage' have been removed.

Usage

cd4

Format

A data frame with 976 rows and 11 variables:

newpid

Patient ID code.

t

Time, in years from first visit.

sqrtcd4

Square root of CD4 count.

treatmnt

Indicator variable for treatment, 1 represents control group and 2 indicates zinc treatment group.

CD4CNT

CD4 count on original (untransformed) scale.

baseage

Age of child in years at initial visit.

visage

Age of child in years at given visit.

Source

http://www.stat.columbia.edu/~gelman/arm/examples/cd4/