Frequencies for first 10,000 rows of rx4v2c2 variable in nhamcsopd2006 dataset :

        for rx4, level 2 of multum drug |
                            category #2 |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
  Anti-infectives: antimalarial agents  |          7        0.07        0.07
          Anti-infectives: sulfanomides |          9        0.09        0.16
Metabolic agents: antihyperlipidemia ag |          1        0.01        0.17
    Cardiovascular agents: vasodilators |          6        0.06        0.23
                   CNS: Anticonvulsants |         47        0.47        0.70
CNS: Antiemetic/antivertigo agents: 5HT |         20        0.20        0.90
            CNS: Anti-Parkinson agents  |          1        0.01        0.91
Coagulation modifiers: antiplatelet age |         56        0.56        1.47
Gastrointestinal agents: miscellaneous  |          1        0.01        1.48
    Hormones: adrenal cortical steroids |         16        0.16        1.64
                 Hormones: sex hormones |          3        0.03        1.67
Miscellaneous agents: local injectable  |          7        0.07        1.74
Miscellaneous agents: genitourinary tra |          2        0.02        1.76
Nutritional products: minerals and elec |          9        0.09        1.85
     Respiratory agents: antihistamines |          9        0.09        1.94
       Respiratory agents: antitussives |          6        0.06        2.00
      Respiratory agents: decongestants |          3        0.03        2.03
Respiratory agents: miscellaneous respi |          1        0.01        2.04
  Topical agents: dermatological agents |          3        0.03        2.07
  Topical agents: mouth and throat prod |          4        0.04        2.11
    Topical agents: vaginal preprations |          1        0.01        2.12
   Miscellaneous agents: antirheumatics |          6        0.06        2.18
Psychotherapeutic agents: antidepressan |          2        0.02        2.20
Psychotherapeutic agents: antipsychotic |          3        0.03        2.23
Gastrointestinal agents: 5-aminosalicyl |          1        0.01        2.24
Metabolic agents: antihyperuricemic age |          2        0.02        2.26
Cardiovascular agents: agents for pulmo |          3        0.03        2.29
Miscellaneous agents: smoking cessation |         11        0.11        2.40
Cardiovascular agents: aldosterone rece |          5        0.05        2.45
                                      . |      9,755       97.55      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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