Table 5.

Summary of error types with any level of clinical decision support across the three sites

	Errors (n)	Errors with CDS, n (%)			P value (between-site)
		Site 1	Site 2	Site 3
Error type					<0.001
Clinical contraindication	29	6 (21)	1 (3)	1 (3)
Dose/Frequency	13	8 (62)	4 (23)	0 (0)
Drug interaction	25	1 (4)	21 (84)	22 (88)
Other†	11	4 (36)	2 (18)	4 (36)
P value (within-site)		<0.001	<0.001	<0.001
Risk rating‡					0.903
High risk§ (8–10)	40	7 (18)	13 (33)	12 (30)
High risk (12)	34	10 (29)	11 (32)	13 (38)
Extreme risk (15–25)	4	2 (50)	3 (75)	2 (50)
P value (within-site)*		0.113*	0.372*	0.463*

Within-site P values compare the CDS implementation rates across the error types/risk ratings. Between-site P values compare the distribution of CDS across the error/risk ratings between the three sites. P values are from Fisher’s exact tests.

*Kendall’s tau and bold P values are significant at P<0.05.

†Other: drug name (n=2); indication (n=1); omission (n=2); route (n=1); and timing/duration (n=6).

‡Risk rating scores are as detailed in online supplementary appendix 2 from the eDelphi study.¹³

§High-risk rating ranges from 8 to 12, with 12 being the highest risk.

CDS, clinical decision support.