Table 5

Pearson’s correlation study between radiation exposure and other variables.

Variables Compared	O-Arm Group		Surgivisio Group		Overall
Variables Compared	r Value (95% CI)	P	r Value (95% CI)	P	r Value (95% CI)	P
E and age	−0.37 (−0.59; −0.10)	<0.01	0.25 (−0.03; 0.50)	0.08	0.12 (−0.08; 0.31)	0.25
E and BMI	0.17 (−0.12; 0.43)	0.25	0.01 (−0.27; 0.29)	0.94	0.12 (−0.08; 0.31)	0.24
E and operative time	0.23 (−0.05; 0.48)	0.11	0.03 (−0.25; 0.30)	0.85	0.13 (−0.07; 0.32)	0.21
E and operative time per level	−0.11 (−0.38; 0.17)	0.45	−0.08 (−0.35; 0.21)	0.60	0.04 (−0.16; 0.23)	0.73
E _2D and operative time	0.15 (−0.14; 0.41)	0.31	−0.01 (−0.29; 0.27)	0.95	−0.01 (−0.21; 0.19)	0.93
E _2D and operative per level	−0.11 (−0.38; 0.17)	0.45	−0.00 (−0.28; 0.28)	0.98	−0.13 (−0.32; 0.07)	0.20
E and imaging duration	0.40 (0.14; 0.61)	<0.01	0.27 (−0.01; 0.51)	0.06	−0.33 (−0.50; −0.15)	<0.01
E _2D and imaging duration	0.78 (0.63; 0.87)	<0.01	0.20 (−0.09; 0.45)	0.18	0.49 (0.33; 0.63)	0.33
E _2D and E _3D	0.39 (0.12; 0.60)	<0.01	0.53 (0.30; 0.71)	<0.01	−0.10 (−0.29; 0.10)	0.33

Abbreviations: BMI, body mass index;2D, 2-dimensional; 3D, 3-dimensional; E, effective dose.
Note: Boldface indicates statistically significant findings.