Frequencies for gi_hcc137 variable in hcccoefn dataset :

    chronic |
     kidney |
   disease, |
     severe |
  (stage 4) |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |          1      100.00      100.00
------------+-----------------------------------
      Total |          1      100.00

by Jean Roth , jroth@nber.org , 2 May 2016