Frequencies for first 10,000 rows of route variable in drug2008q2 dataset : The route of drug | administration | Freq. Percent Cum. -----------------------------+----------------------------------- | 4,866 48.66 48.66 AURICULAR (OTIC) | 1 0.01 48.67 BUCCAL | 3 0.03 48.70 EPIDURAL | 4 0.04 48.74 INTRA-ARTERIAL | 7 0.07 48.81 INTRA-UTERINE | 91 0.91 49.72 INTRACARDIAC | 4 0.04 49.76 INTRACAVERNOUS | 1 0.01 49.77 INTRADERMAL | 7 0.07 49.84 INTRAMUSCULAR | 39 0.39 50.23 INTRAOCULAR | 5 0.05 50.28 INTRAPERITONEAL | 6 0.06 50.34 INTRATHECAL | 12 0.12 50.46 INTRAVENOUS | 694 6.94 57.40 INTRAVENOUS BOLUS | 8 0.08 57.48 INTRAVENOUS DRIP | 41 0.41 57.89 INTRAVESICAL | 10 0.10 57.99 NASAL | 18 0.18 58.17 OCCLUSIVE DRESSING TECHNIQUE | 1 0.01 58.18 OPHTHALMIC | 32 0.32 58.50 ORAL | 2,727 27.27 85.77 OROPHARINGEAL | 1 0.01 85.78 OTHER | 29 0.29 86.07 PARENTERAL | 7 0.07 86.14 PERINEURAL | 1 0.01 86.15 RECTAL | 9 0.09 86.24 RESPIRATORY (INHALATION) | 92 0.92 87.16 SUBCUTANEOUS | 274 2.74 89.90 SUBDERMAL | 2 0.02 89.92 SUBLINGUAL | 36 0.36 90.28 TOPICAL | 42 0.42 90.70 TRANSDERMAL | 122 1.22 91.92 TRANSMAMMARY | 2 0.02 91.94 TRANSPLACENTAL | 45 0.45 92.39 UNKNOWN | 758 7.58 99.97 VAGINAL | 3 0.03 100.00 -----------------------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 18 Dec 2015