Frequencies for first 10,000 rows of route variable in drug2008q4 dataset : The route of drug | administration | Freq. Percent Cum. -----------------------------+----------------------------------- | 4,277 42.77 42.77 18304 | 1 0.01 42.78 21234 | 1 0.01 42.79 21264 | 1 0.01 42.80 21695 | 1 0.01 42.81 AURICULAR (OTIC) | 1 0.01 42.82 BUCCAL | 1 0.01 42.83 EPIDURAL | 1 0.01 42.84 HEMODIALYSIS | 1 0.01 42.85 INTRA-ARTICULAR | 1 0.01 42.86 INTRA-UTERINE | 125 1.25 44.11 INTRADERMAL | 6 0.06 44.17 INTRAMUSCULAR | 47 0.47 44.64 INTRAOCULAR | 15 0.15 44.79 INTRAPERITONEAL | 61 0.61 45.40 INTRATHECAL | 11 0.11 45.51 INTRAVENOUS | 709 7.09 52.60 INTRAVENOUS BOLUS | 11 0.11 52.71 INTRAVENOUS DRIP | 87 0.87 53.58 INTRAVESICAL | 7 0.07 53.65 NASAL | 14 0.14 53.79 OPHTHALMIC | 32 0.32 54.11 ORAL | 3,183 31.83 85.94 OROPHARINGEAL | 1 0.01 85.95 OTHER | 5 0.05 86.00 PARENTERAL | 9 0.09 86.09 RECTAL | 11 0.11 86.20 RESPIRATORY (INHALATION) | 104 1.04 87.24 SUBCUTANEOUS | 355 3.55 90.79 SUBDERMAL | 2 0.02 90.81 SUBLINGUAL | 7 0.07 90.88 TOPICAL | 25 0.25 91.13 TRANSDERMAL | 113 1.13 92.26 TRANSPLACENTAL | 79 0.79 93.05 UNKNOWN | 689 6.89 99.94 VAGINAL | 6 0.06 100.00 -----------------------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 18 Dec 2015