drugusers {icpack}

Interval-censored drug users data

Description

Interval-censored drug users data

Usage

data(drugusers)

Format

Data from a cohort of 940 injecting drug users attending a hospital detoxification unit in Barcelona, Spain. Time is months between initiation of intravenous drug use and HIV seroconversion. A dataframe with five columns:

left

Last negative HIV test (0 if first HIV test was positive)

right

First positive HIV test (Inf if last HIV test was negative)

period

Period of initiation of drug use, factor with levels "1972-1980", "1981-1985", "1986-1991", "1992-1997"

gender

Gender, factor with levels "male" and "female"

age

Age at initiation of drug use (years)

References

Gomez G, Calle ML, Egea JM & Muga R (2000). Risk of HIV infection as a function of the duration of intravenous drug use: a non-parametric Bayesian approach. Stat Med; 19:2641–2656.