Frequencies for first 10,000 rows of route variable in drug2004q4 dataset : The route of drug | administration | Freq. Percent Cum. -----------------------------+----------------------------------- | 4,850 48.50 48.50 AURICULAR (OTIC) | 1 0.01 48.51 BUCCAL | 1 0.01 48.52 CUTANEOUS | 1 0.01 48.53 DENTAL | 1 0.01 48.54 EPIDURAL | 2 0.02 48.56 INTRA-ARTERIAL | 3 0.03 48.59 INTRA-UTERINE | 5 0.05 48.64 INTRAMUSCULAR | 111 1.11 49.75 INTRAOCULAR | 3 0.03 49.78 INTRATHECAL | 2 0.02 49.80 INTRAVENOUS | 569 5.69 55.49 INTRAVENOUS BOLUS | 1 0.01 55.50 INTRAVENOUS DRIP | 51 0.51 56.01 NASAL | 70 0.70 56.71 OPHTHALMIC | 12 0.12 56.83 ORAL | 2,695 26.95 83.78 OROPHARINGEAL | 416 4.16 87.94 OTHER | 10 0.10 88.04 PARENTERAL | 12 0.12 88.16 RECTAL | 11 0.11 88.27 RESPIRATORY (INHALATION) | 52 0.52 88.79 SUBCUTANEOUS | 171 1.71 90.50 SUBLINGUAL | 3 0.03 90.53 TOPICAL | 23 0.23 90.76 TRANSDERMAL | 63 0.63 91.39 TRANSMAMMARY | 1 0.01 91.40 TRANSPLACENTAL | 16 0.16 91.56 UNKNOWN | 843 8.43 99.99 VAGINAL | 1 0.01 100.00 -----------------------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 18 Dec 2015