CASE STUDIES IN BIOMETRY: Chapter 15. Early Lung Cancer Detection Studies Betty J. Flehinger, Marek Kimmel The file ch15.dat contains the following variables: Patient ID : Integer Institution : 0 - Memorial Sloan-Kettering, 1 - Mayo Clinic, 2 - John Hopkins. Group : 1 - Study, 0 - Control. Means of Detection : 0 - Routine Cytology, 1 - Routine X-ray, 2 - Both X-ray and Cytology, 3 - Interval. Cell Type : 0 - Epidermoid, 1 - Adenocarcinoma, 2 - Large Cell, 3 - Oat Cell, 4 - Other. Stage : 4 digits, 1st digit (1,2,3) - overall stage, 2nd digit (1,2,3) - tumor, 3rd digit (0,1,2) - lymph nodes 4th digit (0,1) - distant metastases Operated : 1 - yes, 0 - no. Survival : Integer - Days from detection to last date known alive. Survival Category : 0 - Alive, 1 - Dead of lung cancer, 2 - Dead of other causes. Missing values - '-'.