Frequencies for first 10,000 rows of rx5v2c1 variable in nhamcsed2006 dataset :

        for rx5, level 2 of multum drug |
                            category #1 |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
            anti-infectives: amebicides |          4        0.04        0.04
      anti-infectives: antiviral agents |          2        0.02        0.06
        anti-infectives: cephalosporins |         23        0.23        0.29
 anti-infectives: macrolide derivatives |          7        0.07        0.36
anti-infectives: miscellaneous antibiot |          8        0.08        0.44
           anti-infectives: penicillins |         10        0.10        0.54
            anti-infectives: quinolones |         20        0.20        0.74
         anti-infectives: tetracyclines |          3        0.03        0.77
anti-infectives: urinary anti-infective |          2        0.02        0.79
metabolic agents: antihyperlipidemia ag |          1        0.01        0.80
immunological agents: bacterial vaccine |          1        0.01        0.81
 immunological agents: immune globulins |          1        0.01        0.82
          immunological agents: toxoids |          2        0.02        0.84
cardiovascular agents: angiotensin conv |          3        0.03        0.87
cardiovascular agents: antiadrenergic a |          3        0.03        0.90
cardiovascular agents: antianginal agen |          6        0.06        0.96
cardiovascular agents: antiarrhythmic a |          6        0.06        1.02
cardiovascular agents: beta-adrenergic  |          7        0.07        1.09
cardiovascular agents: calcium channel  |          5        0.05        1.14
       cardiovascular agents: diuretics |         10        0.10        1.24
 cardiovascular agents: intropic agents |          3        0.03        1.27
cardiovascular agents: angiotensin ii i |          3        0.03        1.30
                        cns: analgesics |        150        1.50        2.80
                   cns: anticonvulsants |          1        0.01        2.81
cns: antiemetic/antivertigo agents: 5ht |         15        0.15        2.96
cns: anxiolytics, sedatives, and hypnot |         24        0.24        3.20
               cns: general anesthetics |          2        0.02        3.22
                  cns: muscle relaxants |         11        0.11        3.33
  coagulation modifiers: anticoagulants |          6        0.06        3.39
coagulation modifiers: antiplatelet age |          3        0.03        3.42
      gastrointestinal agents: antacids |          3        0.03        3.45
gastrointestinal agents: antidiarrheals |          2        0.02        3.47
 gastrointestinal agents: gi stimulants |          7        0.07        3.54
gastrointestinal agents: h2 antagonists |         10        0.10        3.64
     gastrointestinal agents: laxatives |          5        0.05        3.69
gastrointestinal agents: miscellaneous  |          5        0.05        3.74
    hormones: adrenal cortical steroids |         21        0.21        3.95
  metabolic agents: antidiabetic agents |          7        0.07        4.02
                hormones: thyroid drugs |          2        0.02        4.04
miscellaneous agents: miscellaneous unc |         12        0.12        4.16
    nutritional products: iron products |          1        0.01        4.17
nutritional products: minerals and elec |         31        0.31        4.48
         nutritional products: vitamins |          2        0.02        4.50
     respiratory agents: antihistamines |         21        0.21        4.71
    respiratory agents: bronchodilators |         19        0.19        4.90
       respiratory agents: expectorants |          1        0.01        4.91
respiratory agents: respiratory inhalan |          2        0.02        4.93
respiratory agents: upper respiratory c |          4        0.04        4.97
  topical agents: dermatological agents |          5        0.05        5.02
topical agents: ophthalmic preparations |          1        0.01        5.03
               hormones: biphosphonates |          1        0.01        5.04
anti-infectives: lincomycin derivatives |          4        0.04        5.08
     topical agents: nasal preparations |          3        0.03        5.11
psychotherapeutic agents: antidepressan |          1        0.01        5.12
psychotherapeutic agents: antipsychotic |          2        0.02        5.14
gastrointestinal agents: proton pump in |          5        0.05        5.19
         cns: cholinesterase inhibitors |          1        0.01        5.20
gastrointestinal agents: functional bow |          5        0.05        5.25
                could not be determined |          2        0.02        5.27
                                      . |      9,473       94.73      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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