Table 4.

Features of standard and navigated iliosacral screw placement (data given per screw). Image converter time involves every C-arm shot taken intraoperatively. Dose of radiation exposure: 42.5 mGy/min

Features	Standard	Navigation	P values
	Surgeons, N = 6	Surgeons, N = 1
Malposition rate	15.4% (n = 10/65)	3.6% (n = 3/82)	p < 0.05 (ß = 0.5)
Procedure time (min)	29.4 ± 12.9 (12.5–75)	39.2 ± 22.2 (15–199)	p < 0.01 (ß = 0.8)
Image converter time (s)	103.1 ± 46.6 (18–354)	62.8 ± 30 (15–156)	p < 0.001 (ß = 1.0)