data sec1_15;
input sex age time death;
female = sex - 1;
drop sex;
cards;
2 51 1 1
2 58 1 1
2 55 2 1
2 28 22 1
1 21 30 0
1 19 28 1
2 25 32 1
2 48 11 1
2 47 14 1
2 25 36 0
2 31 31 0
1 24 33 0
1 25 33 0
2 30 37 0
2 33 35 0 
1 36 25 1
1 30 31 0
1 41 22 1
2 43 26 1
2 45 24 1
2 35 35 0
1 29 34 0
1 35 30 0
1 32 35 1
2 36 40 1
1 32 39 0
;
run;