Table 1.

Characteristics of Drugs Included in Final Dataset (n =1,517)

	Frequency, No. (%)a
Study classification
Nonshortage drug	1,096 (72.2)
Shortage drug	421 (27.8)
Dosage form
Oral only	574 (37.8)
IV only	452 (29.8)
Oral and IV	291 (19.2)
Other	200 (13.2)
Therapeutic class
Other	676 (44.6)
Cardiovascular	227 (15.0)
Antimicrobial	207 (13.6)
Antineoplastic	160 (10.5)
Analgesic	109 (7.2)
Electrolyte	74 (4.9)
Antipsychotic	41 (2.7)
Anesthetic	23 (1.5)
Controlled substance schedule
Schedule II	78 (5.1)
Schedules III–V	53 (3.5)
Orphan drug status	250 (16.5)
Branded/generic product availability
Both branded and generic	675 (44.5)
Generic only	458 (30.2)
Branded only	384 (25.3)
No. of manufacturers per drug, mean (SD)	4.871 (4.641)

Abbreviations: IV, intravenous; SD, standard deviation.

^aUnless indicated otherwise.