Frequencies for first 10,000 rows of emropd variable in nhamcsopd2010 dataset :

 does your opd use an emr or ehr |
   system (not including billing |
               records systems)? |      Freq.     Percent        Cum.
---------------------------------+-----------------------------------
                           blank |     10,000      100.00      100.00
---------------------------------+-----------------------------------
                           Total |     10,000      100.00

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