Frequencies for first 10,000 rows of outtriag variable in nhamcsed2001 dataset :

  refer out |
from triage |
    without |
  treatment |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,977       99.77       99.77
          1 |         23        0.23      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016