Table 4.

Characteristics of medication errors

Variables	Medication errors	Potential ADEs
	n = 492	n = 113
Stage of errors, n(%)
Physician ordering	172 (35)	38 (33)
Transcribing	294 (60)	68 (60)
Administering	8 (2)	3 (3)
Dispensing	17 (3)	4 (4)
Error type, n(%)
Omission	15 (3)	4 (3)
Dose	57 (11)	12 (11)
Frequency	38 (8)	9 (8)
Route of administration	357 (73)	82 (73)
Patient monitoring	7 (1)	2 (2)
Missing	18 (4)	4 (3)
Drug category, n(%)
Anti-infective drugs	162 (33)	37 (33)
Anticoagulants	152 (31)	35 (31)
Corticoids	45 (9)	10 (9)
Analgesic and sedatives	20 (4)	5 (4)
Vasoactives drugs	25 (5)	4 (3)
Perfusion	6 (1)	2 (2)
Others	82 (17)	20 (18)

ADEs, Adverse Drug Events