Table B1.

Multivariable linear mixed model full results.

Hematocrit Change: Postheparinization to Nadir on CPB
	β Estimate	95% Confidence Interval	p-Value
Fixed effects
Intercept	−7.777	−8.04 to −7.52	<.001
Cardioplegia type = MP*	.406	.10 to .72	.011
Cardioplegia type = DN*	−.281	−.52 to −.04	.022
Cardioplegia type = HTK*	−1.236	−1.75 to −.72	<.001
Net CPB circuit priming volume	−.128	−.18 to −.08	<.001
Perfusion volume added on CPB	−.728	−.78 to −.67	<.001
Urine output CPB	.0431	−.01 to .10	.109
Anesthesia volume added on CPB	−.181	−.24 to −.13	<.001
Ultrafiltration volume	.598	.54 to .66	<.001
Total CPB time	−.36	−.47 to −.24	<.001
Cross-clamp time	−.04	−.15 to .07	.476
Age	−.115	−.16 to −.07	<.001
Nadler total blood volume	1.031	.98 to 1.08	<.001
Hct: first in O.R.	1.054	.96 to 1.14	<.001
Hct: post-heparin	−3.667	−3.76 to −3.57	<.001
Female gender	−.586	−.71 to −.47	<.001
Diabetes	−.159	−.25 to −.07	<.001
Non-elective procedure	−.203	−.32 to −.08	<.001
Reoperation	−.163	−.41 to .09	.204
Aortic surgery†	.442	.17 to .71	.001
AV surgery + CABG†	.026	−.15 to .20	.772
Combined AV/MV surgery†	.890	.53 to 1.25	<.001
Isolated AV surgery†	.632	.50 to .77	<.001
Isolated MV surgery†	.795	.61 to .98	<.001
MV surgery + CAB†	.104	−.16 to .37	.443
Random effects
Residual variance	5.432
Variance attributable to surgeons	.204
Variance attributable to hospitals	1.845
Number of surgeons	434
Number of hospitals	170
Intraclass correlation coefficient: surgeons	.027
Intraclass correlation coefficient: hospitals	.247
Observations	13,434

All continuous variables have been scaled and centered before model estimation.

^*Effect defined relative to 4:1.

^†Effect defined relative to CABG procedure.