| cd4 {timereg} | R Documentation |
The multicenter AIDS cohort study
Description
CD4 counts collected over time.
Format
This data frame contains the following columns:
- obs
a numeric vector. Number of observations.
- id
a numeric vector. Id of subject.
- visit
-
a numeric vector. Timings of the visits in years.
- smoke
a numeric vector code. 0: non-smoker, 1: smoker.
- age
a numeric vector. Age of the patient at the start of the trial.
- cd4
a numeric vector. CD4 percentage at the current visit.
- cd4.prev
a numeric vector. CD4 level at the preceding visit.
- precd4
a numeric vector. Post-infection CD4 percentage.
- lt
a numeric vector. Gives the starting time for the time-intervals.
- rt
a numeric vector. Gives the stopping time for the time-interval.
Source
MACS Public Use Data Set Release PO4 (1984-1991). See reference.
References
Kaslow et al. (1987), The multicenter AIDS cohort study: rational, organisation and selected characteristics of the participants. Am. J. Epidemiology 126, 310–318.
Examples
data(cd4)
names(cd4)