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