Frequencies for first 10,000 rows of rx6v2c2 variable in nhamcsopd2006 dataset :

        for rx6, level 2 of multum drug |
                            category #2 |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
  Anti-infectives: antimalarial agents  |          1        0.01        0.01
          Anti-infectives: sulfanomides |          6        0.06        0.07
Metabolic agents: antihyperlipidemia ag |          2        0.02        0.09
    Cardiovascular agents: vasodilators |          7        0.07        0.16
    Cardiovascular agents: vasopressors |          1        0.01        0.17
                   CNS: Anticonvulsants |         14        0.14        0.31
CNS: Antiemetic/antivertigo agents: 5HT |          8        0.08        0.39
Coagulation modifiers: antiplatelet age |         49        0.49        0.88
    Hormones: adrenal cortical steroids |          3        0.03        0.91
                 Hormones: sex hormones |          2        0.02        0.93
Miscellaneous agents: local injectable  |          3        0.03        0.96
Miscellaneous agents: genitourinary tra |          1        0.01        0.97
Nutritional products: minerals and elec |          5        0.05        1.02
     Respiratory agents: antihistamines |          7        0.07        1.09
       Respiratory agents: antitussives |          3        0.03        1.12
Respiratory agents: miscellaneous respi |          1        0.01        1.13
  Topical agents: dermatological agents |          3        0.03        1.16
    Topical agents: vaginal preprations |          1        0.01        1.17
   Miscellaneous agents: antirheumatics |          1        0.01        1.18
Psychotherapeutic agents: antidepressan |          1        0.01        1.19
Psychotherapeutic agents: antipsychotic |          3        0.03        1.22
Metabolic agents: antihyperuricemic age |          3        0.03        1.25
Cardiovascular agents: agents for pulmo |          2        0.02        1.27
Miscellaneous agents: smoking cessation |          3        0.03        1.30
Cardiovascular agents: aldosterone rece |          7        0.07        1.37
                                      . |      9,863       98.63      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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