Frequencies for first 10,000 rows of vitalsd variable in nhamcsed2015 dataset :

Were vitals |
   taken at |
 discharge? |      Freq.     Percent        Cum.
------------+-----------------------------------
      Blank |        304        3.04        3.04
        Yes |      3,814       38.14       41.18
         No |      5,882       58.82      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 20 Nov 2017