NAME: 
Aids Clinical Trials Group Nested Case-control Data (actg320ncc.dat)

SIZE: 
576 Observations, 7 Variables

SOURCE: 
Aids Clinical Trials Group

REFERENCE:
Hosmer, D.W. and Lemeshow, S. and May, S. (2008) 
Applied Survival Analysis: Regression Modeling of Time to Event Data: 
Second Edition, John Wiley and Sons Inc., New York, NY

DESCRITPTIVE ABSTRACT:
Description of the variables in the ACTG320 nested case-control 
example in Section 9.4 of reference text.

DISCLAIMER:  
This data is also available at the following Wiley's FTP site: 
ftp//ftp.wiley.com/public/sci_tech_med/survival

LIST OF VARIABLES: 

Variable	Name	    Description		     Codes/Values
********************************************************************************
1               set         Case-Control Set         1 - 96
2               case        Case-Control Indicator   1 = Case 0 = Control
3               id          Study ID
4               time        Follow Up Time           Days*
5               tx          Treatment                1 = Treatment includes IDV
                                                     0 = Control (without IDV)
6               Age         Age at Enrollment        Years
7               cd4         Baseline CD4 count       Cells/Milliliter

* Time is jittered for case to break ties