Months  Quit   Treatment Age
   1      1        0      16
   2      1        0      24
   2      1        0      18
   3      0        0      27
   4      1        0      25
   5      1        0      21
  11      1        0      55
   7      1        1      26
   8      1        1      36
  10      1        1      38
  10      0        1      45
  12      1        1      47