Frequencies for first 10,000 rows of rx2v2c2 variable in nhamcsopd2006 dataset :

        for rx2, level 2 of multum drug |
                            category #2 |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
  Anti-infectives: antimalarial agents  |         17        0.17        0.17
Anti-infectives: miscellaneous antibiot |          7        0.07        0.24
          Anti-infectives: sulfanomides |         21        0.21        0.45
Metabolic agents: antihyperlipidemia ag |          4        0.04        0.49
       Cardiovascular agents: diuretics |          1        0.01        0.50
    Cardiovascular agents: vasodilators |          4        0.04        0.54
                   CNS: Anticonvulsants |         76        0.76        1.30
CNS: Antiemetic/antivertigo agents: 5HT |         75        0.75        2.05
            CNS: Anti-Parkinson agents  |          1        0.01        2.06
Coagulation modifiers: antiplatelet age |         60        0.60        2.66
    Hormones: adrenal cortical steroids |         18        0.18        2.84
                 Hormones: sex hormones |         14        0.14        2.98
        Miscellaneous agents: antidotes |          1        0.01        2.99
Miscellaneous agents: local injectable  |         53        0.53        3.52
Miscellaneous agents: genitourinary tra |          1        0.01        3.53
Nutritional products: minerals and elec |          4        0.04        3.57
     Respiratory agents: antihistamines |         41        0.41        3.98
       Respiratory agents: antitussives |          6        0.06        4.04
      Respiratory agents: decongestants |         10        0.10        4.14
Respiratory agents: miscellaneous respi |          4        0.04        4.18
Respiratory agents: respiratory inhalan |          2        0.02        4.20
  Topical agents: dermatological agents |         11        0.11        4.31
  Topical agents: mouth and throat prod |          4        0.04        4.35
    Topical agents: vaginal preprations |         11        0.11        4.46
   Miscellaneous agents: antirheumatics |         11        0.11        4.57
Alternative medicines: nutraceutical pr |          2        0.02        4.59
Psychotherapeutic agents: antidepressan |          4        0.04        4.63
Psychotherapeutic agents: antipsychotic |          7        0.07        4.70
Gastrointestinal agents: 5-aminosalicyl |          1        0.01        4.71
Metabolic agents: antihyperuricemic age |          3        0.03        4.74
Cardiovascular agents: agents for pulmo |          1        0.01        4.75
Miscellaneous agents: smoking cessation |         39        0.39        5.14
Cardiovascular agents: aldosterone rece |          5        0.05        5.19
                                      . |      9,481       94.81      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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