Frequencies for first 10,000 rows of rx8v3c1 variable in nhamcsed2006 dataset :

        for rx8, level 3 of multum drug |
                            category #1 |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
cns: analgesics: miscellaneous analgesi |          2        0.02        0.02
              cns: analgesics: narcotic |          1        0.01        0.03
           cns: analgesics: salicylates |          2        0.02        0.05
topical agents: dermatological agents:  |          1        0.01        0.06
cardiovascular agents: diuretics: loop  |          1        0.01        0.07
anti-infectives: cephalosporins: first  |          1        0.01        0.08
anti-infectives: cephalosporins: third  |          2        0.02        0.10
metabolic agents: antihyperlipidemic ag |          4        0.04        0.14
cns: analgesics: narcotic analgesic com |          1        0.01        0.15
cns: antiemetic/antivertigo agents: 5ht |          3        0.03        0.18
metabolic agents: antidiabetic agents:  |          1        0.01        0.19
anti-infectives: antifungals: azole ant |          1        0.01        0.20
metabolic agents: antihyperlipidemic ag |          1        0.01        0.21
coagulation modifiers: anticoagulants:  |          1        0.01        0.22
coagulation modifiers: anticoagulants:  |          1        0.01        0.23
cardiovas agents: beta-adrenergic block |          1        0.01        0.24
respiratory agents: bronchodilators: an |          1        0.01        0.25
hormones: adrenal cortical steroids: gl |          1        0.01        0.26
psychotherapeutic agents: antipsychotic |          1        0.01        0.27
                                      . |      9,973       99.73      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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