Frequencies for first 10,000 rows of rx3v2c2 variable in nhamcsed2006 dataset :

        for rx3, level 2 of multum drug |
                            category #2 |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
  anti-infectives: antimalarial agents  |          6        0.06        0.06
anti-infectives: miscellaneous antibiot |         21        0.21        0.27
          anti-infectives: sulfanomides |         20        0.20        0.47
antineoplastics: miscellaneous antineop |          1        0.01        0.48
       cardiovascular agents: diuretics |          1        0.01        0.49
    cardiovascular agents: vasodilators |         33        0.33        0.82
    cardiovascular agents: vasopressors |          1        0.01        0.83
                   cns: anticonvulsants |         49        0.49        1.32
cns: antiemetic/antivertigo agents: 5ht |        143        1.43        2.75
coagulation modifiers: antiplatelet age |         28        0.28        3.03
        miscellaneous agents: antidotes |          2        0.02        3.05
miscellaneous agents: local injectable  |         29        0.29        3.34
nutritional products: minerals and elec |          6        0.06        3.40
     respiratory agents: antihistamines |         49        0.49        3.89
       respiratory agents: antitussives |          8        0.08        3.97
      respiratory agents: decongestants |          4        0.04        4.01
respiratory agents: miscellaneous respi |         53        0.53        4.54
  topical agents: dermatological agents |          8        0.08        4.62
  topical agents: mouth and throat prod |          2        0.02        4.64
    topical agents: vaginal preprations |          5        0.05        4.69
psychotherapeutic agents: antipsychotic |          7        0.07        4.76
metabolic agents: glucose elevating age |          1        0.01        4.77
miscellaneous agents: smoking cessation |          1        0.01        4.78
                                      . |      9,522       95.22      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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