Frequencies for medsurg variable in drg1990 dataset :

Medical/Sur |
 gical Flag |      Freq.     Percent        Cum.
------------+-----------------------------------
            |         20        4.18        4.18
        MED |        252       52.72       56.90
       SURG |        206       43.10      100.00
------------+-----------------------------------
      Total |        478      100.00

by Jean Roth , jroth@nber.org , 22 Apr 2016