Frequencies for first 10,000 rows of rx6v2c1 variable in nhamcsed2006 dataset :

        for rx6, level 2 of multum drug |
                            category #1 |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
            anti-infectives: amebicides |          4        0.04        0.04
        anti-infectives: cephalosporins |          7        0.07        0.11
 anti-infectives: macrolide derivatives |          5        0.05        0.16
anti-infectives: miscellaneous antibiot |          1        0.01        0.17
           anti-infectives: penicillins |          5        0.05        0.22
            anti-infectives: quinolones |          4        0.04        0.26
metabolic agents: antihyperlipidemia ag |          3        0.03        0.29
          immunological agents: toxoids |          2        0.02        0.31
cardiovascular agents: angiotensin conv |          3        0.03        0.34
cardiovascular agents: antiadrenergic a |          1        0.01        0.35
cardiovascular agents: antianginal agen |          3        0.03        0.38
cardiovascular agents: antiarrhythmic a |          3        0.03        0.41
cardiovascular agents: beta-adrenergic  |          6        0.06        0.47
cardiovascular agents: calcium channel  |          3        0.03        0.50
       cardiovascular agents: diuretics |          7        0.07        0.57
 cardiovascular agents: intropic agents |          2        0.02        0.59
cardiovascular agents: miscellaneous ca |          1        0.01        0.60
    cardiovascular agents: vasopressors |          2        0.02        0.62
cardiovascular agents: angiotensin ii i |          1        0.01        0.63
                        cns: analgesics |         55        0.55        1.18
                   cns: anticonvulsants |          2        0.02        1.20
cns: antiemetic/antivertigo agents: 5ht |          9        0.09        1.29
            cns: anti-parkinson agents  |          1        0.01        1.30
cns: anxiolytics, sedatives, and hypnot |         12        0.12        1.42
               cns: general anesthetics |          1        0.01        1.43
                  cns: muscle relaxants |          7        0.07        1.50
  coagulation modifiers: anticoagulants |          2        0.02        1.52
      gastrointestinal agents: antacids |          3        0.03        1.55
gastrointestinal agents: antidiarrheals |          1        0.01        1.56
 gastrointestinal agents: gi stimulants |          2        0.02        1.58
gastrointestinal agents: h2 antagonists |          6        0.06        1.64
     gastrointestinal agents: laxatives |          5        0.05        1.69
    hormones: adrenal cortical steroids |         10        0.10        1.79
  metabolic agents: antidiabetic agents |          2        0.02        1.81
                hormones: thyroid drugs |          2        0.02        1.83
miscellaneous agents: miscellaneous unc |          3        0.03        1.86
miscellaneous agents: genitourinary tra |          1        0.01        1.87
nutritional products: minerals and elec |          9        0.09        1.96
         nutritional products: vitamins |          2        0.02        1.98
     respiratory agents: antihistamines |          9        0.09        2.07
    respiratory agents: bronchodilators |          7        0.07        2.14
       respiratory agents: expectorants |          1        0.01        2.15
respiratory agents: upper respiratory c |          1        0.01        2.16
topical agents: antiseptics and germici |          1        0.01        2.17
  topical agents: dermatological agents |          1        0.01        2.18
topical agents: ophthalmic preparations |          1        0.01        2.19
      topical agents: otic preparations |          1        0.01        2.20
psychotherapeutic agents: antidepressan |          1        0.01        2.21
psychotherapeutic agents: antipsychotic |          2        0.02        2.23
gastrointestinal agents: proton pump in |         14        0.14        2.37
gastrointestinal agents: functional bow |          2        0.02        2.39
                could not be determined |          1        0.01        2.40
                                      . |      9,760       97.60      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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