Frequencies for first 10,000 rows of rx6v2c2 variable in nhamcsed2006 dataset :

        for rx6, level 2 of multum drug |
                            category #2 |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
anti-infectives: miscellaneous antibiot |          4        0.04        0.04
    cardiovascular agents: vasodilators |          3        0.03        0.07
    cardiovascular agents: vasopressors |          2        0.02        0.09
                   cns: anticonvulsants |          5        0.05        0.14
cns: antiemetic/antivertigo agents: 5ht |         11        0.11        0.25
coagulation modifiers: antiplatelet age |          6        0.06        0.31
miscellaneous agents: local injectable  |          2        0.02        0.33
nutritional products: minerals and elec |          4        0.04        0.37
     respiratory agents: antihistamines |          5        0.05        0.42
respiratory agents: miscellaneous respi |          6        0.06        0.48
  topical agents: dermatological agents |          2        0.02        0.50
    topical agents: vaginal preprations |          1        0.01        0.51
psychotherapeutic agents: antipsychotic |          3        0.03        0.54
                                      . |      9,946       99.46      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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