Frequencies for first 10,000 rows of route variable in drug2010q1 dataset : The route of drug | administration | Freq. Percent Cum. -----------------------------+----------------------------------- | 3,892 38.92 38.92 20367 | 1 0.01 38.93 21323 | 1 0.01 38.94 21790 | 1 0.01 38.95 BUCCAL | 1 0.01 38.96 CUTANEOUS | 4 0.04 39.00 HEMODIALYSIS | 1 0.01 39.01 INTRA-ARTERIAL | 1 0.01 39.02 INTRA-ARTICULAR | 1 0.01 39.03 INTRA-UTERINE | 116 1.16 40.19 INTRADERMAL | 1 0.01 40.20 INTRAMUSCULAR | 104 1.04 41.24 INTRAOCULAR | 35 0.35 41.59 INTRAPERITONEAL | 14 0.14 41.73 INTRATHECAL | 17 0.17 41.90 INTRAVENOUS | 750 7.50 49.40 INTRAVENOUS BOLUS | 10 0.10 49.50 INTRAVENOUS DRIP | 123 1.23 50.73 INTRAVESICAL | 4 0.04 50.77 NASAL | 10 0.10 50.87 OPHTHALMIC | 14 0.14 51.01 ORAL | 3,295 32.95 83.96 OTHER | 21 0.21 84.17 PARENTERAL | 8 0.08 84.25 RECTAL | 10 0.10 84.35 RESPIRATORY (INHALATION) | 134 1.34 85.69 SUBCUTANEOUS | 281 2.81 88.50 SUBLINGUAL | 11 0.11 88.61 TOPICAL | 27 0.27 88.88 TRANSDERMAL | 101 1.01 89.89 TRANSPLACENTAL | 74 0.74 90.63 UNKNOWN | 934 9.34 99.97 URETHRAL | 1 0.01 99.98 VAGINAL | 2 0.02 100.00 -----------------------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 18 Dec 2015