Table 2. Groupwise comparison of retroversion and inclination measurements.

	Native Retroversion (Mean Paired Difference, Degrees)	p-value	Native Inclination (Median Paired Difference, Degrees)	p-value
Blueprint vs. Materialise	0.00	0.361	0.07	0.948
Exactec vs. Materialise	-1.50	0.492	2.47	0.039
Zimmer vs. Materialise	-2.50	0.948	4.72	<0.001
Blueprint vs. Zimmer	-0.50	0.068	-4.65	<0.001
Blueprint vs. Exactec	0.00	0.427	2.40	0.009
Zimmer vs. Exactec	0.50	0.186	-2.25	0.013