Frequencies for first 10,000 rows of ncmed1 variable in nhamcsopd2007 dataset :

      was medication 1 new or |
                   continued? |      Freq.     Percent        Cum.
------------------------------+-----------------------------------
                        blank |        174        1.74        1.74
               not applicable |      3,205       32.05       33.79
                          new |      2,463       24.63       58.42
                    continued |      4,158       41.58      100.00
------------------------------+-----------------------------------
                        Total |     10,000      100.00

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