aids {catdata}

AIDS

Description

The aids data was a survey around 369 men who were infected with HIV.

Usage

data(aids)

Format

A data frame with 2376 observations on the following 8 variables.

cd4

number of CD4 cells

time

years since seroconversion

drugs

recreational drug use (yes=1/no=0)

partners

number of sexual partners

packs

packs of cigarettes a day

cesd

a mental illness score

age

Age centered around 30

person

Identification number

Source

Multicenter AIDS Cohort Study (MACS), see Zeger and Diggle (1994), Semi-parametric models for longitudinal data with application to CD4 cell numbers in HIV seroconverters, Biometrics, 50, 689–699.

Examples

## Not run: 
##look for:
if(interactive()){vignette("random-aids")}

## End(Not run)