Table 1.

Comparison of the general surgical characteristics of the operation between the 2 groups of patients.

Characteristics	Control group (n=21)	Study group (n=21)	t testa	P value
Operation duration (minutes), mean (SD)	88.29 (14.29)	64.12 (10.86)	6.171	<.001
Frequency of intraoperative fluoroscopy, n	19.86 (3.29)	12.20 (2.11)	9.098	<.001
Intraoperative blood loss (mL), mean (SD)	76.92 (8.29)	74.51 (7.48)	0.989	.33
Frequency of intraoperative drilling, n	10.71 (2.92)	5.52 (1.43)	7.315	<.001

^adegrees of freedom: 40.