Frequencies for first 10,000 rows of rx4v1c1 variable in nhamcsopd2008 dataset :

   for rx4, |
 level 1 of |
multum drug |
category #1 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      7,291       72.91       72.91
        001 |        101        1.01       73.92
        020 |         38        0.38       74.30
        028 |          3        0.03       74.33
        040 |        467        4.67       79.00
        057 |        564        5.64       84.64
        081 |         31        0.31       84.95
        087 |        177        1.77       86.72
        097 |        130        1.30       88.02
        105 |         77        0.77       88.79
        115 |        198        1.98       90.77
        122 |        243        2.43       93.20
        133 |        108        1.08       94.28
        218 |         30        0.30       94.58
        242 |        138        1.38       95.96
        254 |        103        1.03       96.99
        331 |          4        0.04       97.03
        358 |        280        2.80       99.83
        365 |         16        0.16       99.99
        899 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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