Table 2.

Exposure Stage Details: Comparison Between the Two Groups (Unpaired t Test).

	Group A (Mean ± SD)	Group B (Mean ± SD)	P
Mean arterial pressure during exposure, mm Hg	73.65 ± 5.67	78.45 ± 4.55	.097
Exposure surgical time, min	99.29 ± 19.17	160.1 ± 31.29	.001*
Exposure surgical time per instrumented vertebrae, min	8.73 ± 1.95	12.8 ± 3.03	.0004*
Exposure stage blood loss, mL	38.57 ± 27.48	91.03 ± 26.02	.0001*
Exposure stage blood loss per instrumented vertebrae, mL	3.415 ± 2.66	7.34 ± 1.6	.00 457*
Exposure stage blood loss per instrumented vertebrae per minute, mL/min	0.034 ± 0.027	0.625 ± 0.373	.0006*

* Significant P value.