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

       Does |
    patient |
      have: |
Obstructive |
sleep apnea |
      (OSA) |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      9,792       97.92       97.92
        Yes |        208        2.08      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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