| AIDS {SurvTrunc} | R Documentation |
AIDS blood transfusion data
Description
Data collected by CDC data registry. Adults infected with virus from contaminated blood transfusion in April 1978. Event time is the induction time from HIV infection to AIDS. Infection time is time from blood transfusion to HIV infection. Data left truncated because only subjects who develop AIDS after 1982 are unobserved (as HIV unknown before 1982). Data also right truncated because cases reported after July 1, 1986 are not included in the sample to avoid inconsistent data and bias from reporting delay.
Usage
data(AIDS)
Format
This data frame contains the following columns:
- Induction.time
Months between HIV infection and development of AIDS (event time of interest)
- Adult
Indicator of adult (1=adult,0=child)
- Infection.time
Months from blood transfusion date (Apr 1,1978) to HIV infection
- L.time
Left truncation time: 45 - infection time
- R.time
Right truncation time: Left truncation time + 54 months
- status
Indicator of event occurrence, which is set to 1 since all subjects experience the event
Source
Klein and Moeschberger (1997) Survival Analysis Techniques for Censored and truncated data, Springer.
Lagakos et al. Biometrika 68 (1981): 515-523.
Examples
data(AIDS)