Frequencies for first 10,000 rows of cardenz variable in nhamcsed2010 dataset :

    Cardiac |
    Enzymes |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      8,389       83.89       83.89
        yes |      1,611       16.11      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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