CASE STUDIES IN BIOMETRY: Chapter 18.

Modeling the Precursors of Cervical Cancer

Allison J. Kirby, David J.Spiegelhalter

These data remain the copyright of the Harris Birthright Research Unit
of the University of Aberdeen, UK. It may be used freely for
non-commercial purposes and can be freely distributed provided its
source is acknowledged.

The file ch18b.dat contains the following smear-specific variables:

Variable                Coding                  
Control/patient code    0=control, 1=patient    
Study number            1-500 for each group    
Smear number            1-15                    
Smear grade             0=negative, 1=positive  
Interval in days        0-3733, 0 if 1st smear  
since last smear