Frequencies for ce_copd_cvd_cad variable in hcccoefn dataset :

ce_copd_cvd |
       _cad |      Freq.     Percent        Cum.
------------+-----------------------------------
       .173 |          1      100.00      100.00
------------+-----------------------------------
      Total |          1      100.00

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