treatment (1=standard, 2=test)
cell type 1 (1=large, 0=other)
cell type 2 (1=adeno, 0=other)
cell type 3 (1=small, 0=other)
cell type 4 (1=squamous, 0=other)
survival time in days
performance status (0=worst, 100=best)
disease duration (months)
age in years
prior therapy (0=none, 10=some)
status (0=censored, 1=died)