Table 3.

Outcome and process measures.

	Pre-guideline (2017–2018)	Post-guideline (2019)	Ratio, Post: Pre	p
Months	24	12
Admissions	1407	666
Transfusions	359	79	0.33a	0.0001
Indicated	183 (51%)	60 (76%)
Non-indicated	176 (49%)	19 (24%)
Transfusions per month	15.0 ± 0.8b	6.6 ± 0.7	0.44c	<0.0001
Indicated	7.6 ± 0.6	5.0 ± 0.6	0.66	0.005
Non-indicated	7.3 ± 0.6	1.6 ± 0.4	0.22	<0.0001
Transfusions per 100 admissions	25.5 ± 1.4	11.9 ± 1.3	0.46	<0.0001
Indicated	13.0 ± 1.0	9.0 ± 1.2	0.69	0.01
Non-indicated	12.5 ± 0.9	2.9 ± 0.7	0.23	<0.0001
Patients with non-indicated transfusion	62	11
Per month	2.6 ± 0.3	0.9 ± 0.3	0.35	0.002
Per 100 admissions	4.4 ± 0.6	1.7 ± 0.5	0.37	0.003

^aOdds ratio (OR) for non-indicated transfusion, from logistic regression. p tests H₀: OR = 1.

^bRate ± standard error, from Poisson regression.

^cRate ratio (RR) from Poisson regression. p tests H₀: RR = 1.