The effect on potential adverse drug events of a pharmacist-acquired medication history in an emergency department: a multicentre, double-blind, randomised, controlled, parallel-group study

Table 2 Discrepancy type and potential severity

Type of PADE	Class 1^a			Class 2^b			Class 3^c
Type of PADE	Total group	Control	Intervention	Total group	Control	Intervention	Total group	Control	Intervention
Incorrect or omitted dose	39 (14.4)	22 (13.2)	17 (16.4)	32 (9.3)	12 (5.0)	20 (18.5)	94 (48.5)	49 (39.8)	45 (63.4)
Therapeutic duplication	4 (1.5)	3 (1.8)	1 (1.0)	0 (0)	0 (0)	0 (0)	1 (0.5)	1 (0.8)	0 (0)
Incorrect or omitted frequency	0 (0)	0 (0)	0 (0)	4 (1.2)	4 (1.7)	0 (0)	2 (1.0)	2 (1.6)	0 (0)
Slow to restart drug therapy	28 (10.3)	13 (7.8)	15 (14.4)	103 (29.8)	43 (18.0)	60 (55.6)	25 (12.9)	8 (6.5)	17 (23.9)
No indication	0 (0)	0 (0)	0 (0)	2 (0.6)	2 (0.8)	0 (0)	0 (0)	0 (0)	0 (0)
Drug omission	190 (70.1)	123 (73.7)	67 (64.4)	187 (54.0)	164 (68.9)	23 (21.3)	70 (36.1)	63 (51.2)	7 (9.9)
Too soon to restart drug therapy	10 (3.7)	6 (3.6)	4 (3.9)	14 (4.1)	9 (3.8)	5 (4.6)	2 (1.0)	0 (0)	2 (2.8)
Inappropriate or omitted route	0 (0)	0 (0)	0 (0)	4 (1.2)	4 (1.7)	0 (0)	0 (0)	0 (0)	0 (0)

^aClass 1: discrepancies unlikely to cause patient discomfort or clinical deterioration. ^bClass 2 discrepancies which could cause moderate discomfort or clinical deterioration
^cClass 3 discrepancies potentially resulting in severe discomfort or clinical deterioration

ISSN: 1472-6963