Table 3. Comparison of clinical data between the two groups.

	Group A (n = 32)	Group B (n = 29)	P value
Surgical duration, h	3.8 ± 0.7	3.9 ± 0.6	0.902
Anesthesia duration, h	4.4 ± 0.6	4.3 ± 0.6	0.926
Cardiopulmonary bypass time, min	97.9 ± 12.9	99.0 ± 13.8	0.713
Aortic cross-clamp time, min	62.0 ± 12.4	61.8 ± 13.3	0.950
Cerebral data in the operating room
Baseline rScO2, left	67.8 ± 4.9	69.0 ± 4.9	0.336
Baseline rScO2, right	69.0 ± 4.0	68.5 ± 4.1	0.665
Duration of patients with cerebral desaturation*, min	4.5 ± 2.2	6.8 ± 3.2	0.001
rScO2 AUC†, min%	9.4 ± 3.7	11.9 ± 4.8	0.024

*rScO₂ decreased by more than 10% at baseline. ^†rScO₂ AUC was quantified as the “area under the threshold” (integration of decreased by more than 10% of baseline over time, min%). The rScO2 AUC data in this study were directly derived from INVOS 5100C, which was automatically computed by INVOS 5100C based on a set threshold. rScO₂: regional cerebral oxygen saturation; AUC: area under the curve