Frequencies for first 10,000 rows of ncmed1 variable in nhamcsopd2008 dataset :

      was medication 1 new or |
                   continued? |      Freq.     Percent        Cum.
------------------------------+-----------------------------------
                        blank |        288        2.88        2.88
               not applicable |      2,901       29.01       31.89
                          new |      2,611       26.11       58.00
                    continued |      4,200       42.00      100.00
------------------------------+-----------------------------------
                        Total |     10,000      100.00

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