Frequencies for first 10,000 rows of ewarno variable in nhamcsopd2011 dataset :

          If yes to ordering |
 prescriptions, are warnings |
     of drug interactions or |
                   contraind |      Freq.     Percent        Cum.
-----------------------------+-----------------------------------
                       Blank |     10,000      100.00      100.00
-----------------------------+-----------------------------------
                       Total |     10,000      100.00

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