treatment time event
trt1 34 1
trt1 42 1
trt1 27 1
trt1 60 0
trt1 33 1
trt2 8 1
trt2 11 1
trt2 21 1
trt2 18 1
trt2 21 1
trt3 57 1
trt3 60 0
trt3 60 0
trt3 41 1
trt3 37 1