Frequencies for first 10,000 rows of rx5v2c2 variable in nhamcsopd2006 dataset :

        for rx5, level 2 of multum drug |
                            category #2 |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
  Anti-infectives: antimalarial agents  |          6        0.06        0.06
Anti-infectives: miscellaneous antibiot |          1        0.01        0.07
          Anti-infectives: sulfanomides |          6        0.06        0.13
Metabolic agents: antihyperlipidemia ag |          4        0.04        0.17
    Cardiovascular agents: vasodilators |          6        0.06        0.23
                   CNS: Anticonvulsants |         30        0.30        0.53
CNS: Antiemetic/antivertigo agents: 5HT |         12        0.12        0.65
            CNS: Anti-Parkinson agents  |          2        0.02        0.67
Coagulation modifiers: antiplatelet age |         44        0.44        1.11
    Hormones: adrenal cortical steroids |          5        0.05        1.16
                 Hormones: sex hormones |          1        0.01        1.17
Miscellaneous agents: local injectable  |          7        0.07        1.24
Miscellaneous agents: miscellaneous unc |          1        0.01        1.25
Nutritional products: minerals and elec |          5        0.05        1.30
     Respiratory agents: antihistamines |         19        0.19        1.49
       Respiratory agents: antitussives |          2        0.02        1.51
      Respiratory agents: decongestants |          4        0.04        1.55
Respiratory agents: miscellaneous respi |          3        0.03        1.58
  Topical agents: dermatological agents |          2        0.02        1.60
   Miscellaneous agents: antirheumatics |          1        0.01        1.61
Psychotherapeutic agents: antidepressan |          1        0.01        1.62
Psychotherapeutic agents: antipsychotic |          1        0.01        1.63
Immunological agents: monoclonal antibo |          1        0.01        1.64
Metabolic agents: antihyperuricemic age |          7        0.07        1.71
Cardiovascular agents: agents for pulmo |          4        0.04        1.75
Miscellaneous agents: smoking cessation |          5        0.05        1.80
Cardiovascular agents: aldosterone rece |          3        0.03        1.83
                                      . |      9,817       98.17      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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