Frequencies for first 10,000 rows of rx1v2c2 variable in nhamcsed2006 dataset :

        for rx1, level 2 of multum drug |
                            category #2 |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
  anti-infectives: antimalarial agents  |         28        0.28        0.28
anti-infectives: miscellaneous antibiot |         23        0.23        0.51
          anti-infectives: sulfanomides |         97        0.97        1.48
       cardiovascular agents: diuretics |          7        0.07        1.55
    cardiovascular agents: vasodilators |         75        0.75        2.30
                        cns: analgesics |          1        0.01        2.31
                   cns: anticonvulsants |        146        1.46        3.77
cns: antiemetic/antivertigo agents: 5ht |        214        2.14        5.91
coagulation modifiers: antiplatelet age |        125        1.25        7.16
     gastrointestinal agents: laxatives |          1        0.01        7.17
    hormones: adrenal cortical steroids |          5        0.05        7.22
                 hormones: sex hormones |          6        0.06        7.28
        miscellaneous agents: antidotes |         13        0.13        7.41
miscellaneous agents: local injectable  |         65        0.65        8.06
nutritional products: minerals and elec |          6        0.06        8.12
     respiratory agents: antihistamines |        150        1.50        9.62
       respiratory agents: antitussives |         25        0.25        9.87
      respiratory agents: decongestants |          6        0.06        9.93
respiratory agents: miscellaneous respi |        242        2.42       12.35
respiratory agents: respiratory inhalan |          1        0.01       12.36
  topical agents: dermatological agents |         24        0.24       12.60
    topical agents: vaginal preprations |          7        0.07       12.67
psychotherapeutic agents: antipsychotic |         20        0.20       12.87
metabolic agents: glucose elevating age |          3        0.03       12.90
miscellaneous agents: smoking cessation |          1        0.01       12.91
                                      . |      8,709       87.09      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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