Description Usage Format Source Examples
Description of the variables in the UIS Study described in Table 1.3 of Hosmer, D.W. and Lemeshow, S. and May, S. (2008)
1 | data("uis")
|
A data frame with 628 observations on the following 12 variables.
id
Participant id; a numeric vector
age
Age at enrollment
beck
Beck depression score at admission
hercoc
Heroin/cocaine use during 3 months priort to enrollment;a factor with levels heroin and cocaine
herorin only
cocaine only
neither herorin nor cocaine
ivhx
IV drug use history at enrollment; a factor with levels never
previous
recent
ndrugtx
Number of prior treatments; a numeric vector
race
participant race; a factor with levels white
other
treat
treatment randomization assignment; a factor with levels short
long
site
Treatment site; a factor with levels A
B
los
length of treatment; a numeric vector
time
Time to return to drug use, measured in days from admission; a numeric vector
censor
Returned to drug use; numeric, 1 = yes, 0 = no
Applied Survival Analysis: Regression Modeling of Time to Event Data: Second Edition, John Wiley and Sons Inc., New York, NY
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