Table 2.

Intra-operative variables

Variable	Female	Male	p-value
Number of procedures	4,226	13,137
Number of distal anastomoses
1	3.2	1.6
2	20.9	15.0
3	44.8	41.8
4+	31.2	41.6
			<0.001
CPB duration, minutes, median [IQR]	90 [69-117]	93 [73-121]	<0.001
Cross-clamp duration, minutes, median [IQR]	68 [52-89]	71 [55-93]	<0.001
Returned to bypass, %	2.6	1.7	<0.001
IABP, % yes
Pre-operative	7.3	6.7
Intra-operative	1.7	1.2
Post-operative	0.5	0.2
			0.0008
Pulsatile perfusion, % yes	0.8	0.8	0.80
Strategies to manage hemodilution
Static prime volume per BSA, mL/m2, median [IQR]	552 [467-667]	511 [428-604]	<0.001
Retrograde autologous priming, % yes	77.9	79.2	0.051
Retrograde autologous priming, mL, median [IQR]	550 [400-700]	600 [400-700]	<0.001
Net prime volumea per BSA, mL/m2, median [IQR]	407 [282-566]	363 [251-498]	<0.001
Total fluid administrationb, mL, median [IQR]	1000 [560-1700]	938 [518-1600]	<0.001
Blood management strategies
Conventional ultrafiltration, % yes	23.1	21.8	0.073
Volume if performed, mL, median [IQR]	1200 [700-2050]	1400 [800-2500]	<0.001
Cell-saving device, % yes	85.4	85.0	0.49
Acute normovolemic hemodilution, %yes	9.0	15.7	<0.001
Volume, mL, median [IQR]	450 [400-500]	450 [450-900]	<0.001
Cardiotomy suction, % yes	61.5	59.3	0.022
Blood-based cardioplegia, % yes	75.9	74.3	0.026
Total cardioplegia volume, mL, median [IQR]	2000 [1300-2800]	2136 [1450-3090]	<0.001
Lowest core temperaturec
Severe hypothermia	0.3	0.3
Moderate hypothermia	4.7	3.4
Mild hypothermia	67.7	67.7
Normothermia	27.3	28.6
			0.0013
Furosemide use, % yes	4.5	5.4	0.014
Sodium bicarbonate total dose, mg, median [IQR]	50 [40-50]	50 [40-50]	0.16
Vasopressin, % yes	9.4	9.2	0.75
Nadir hematocrit
<19	15.8	3.0
19-21	32.2	10.3
22-24	28.3	18.0
25-27	15.3	25.6
28+	8.4	43.2
			<0.001