Table 3.

Odds ratios for ‘RBC’ and ‘Any’ transfusion for pre- versus post merger

		Unadjusted	Adjusted^a	Adjusted for EuroSCORE	Interaction with elective/non-elective
24 hours, OR (95% CI)	RBC	0.77 (0.68–0.88), p=0.0001	0.78 (0.67–0.92), p=0.002	0.79 (0.69–0.91), p=0.001	p=0.867
	Any	0.86 (0.76–0.99), p=0.033	0.88 (0.76–1.03), p=0.125	0.89 (0.78–1.02), p=0.112	p=0.943
72 hours, OR (95% CI)	RBC	0.77 (0.68–0.88), p=0.0001	0.76 (0.65–0.9), p=0.001	0.79 (0.69–0.91), p=0.001	p=0.410
	Any	0.86 (0.75–0.99), p=0.034	0.88 (0.75–1.04), p=0.129	0.89 (0.77–1.03), p=0.115	p=0.588
Until discharge, OR (95% CI)	RBC	0.77 (0.68–0.89), p=0.0002	0.76 (0.65–0.89), p=0.001	0.79 (0.69–0.91), p=0.001	p=0.656
Until discharge, OR (95% CI)	Any	0.84 (0.73–0.97), p=0.019	0.86 (0.73–1.01), p=0.063	0.87 (0.75–1.01), p=0.069	p=0.976

↵^a = adjusted for age, gender, haemoglobin, cardiac procedure and urgency of surgery; CI = confidence interval; EuroSCORE = European System for Cardiac Operative Risk Evaluation; OR = odds ratio; RBC = red blood cells.