. 2016 May 5;474(10):2085–2093. doi: 10.1007/s11999-016-4863-7

Table 3.

Results of the radiographic analysis in the two groups

	CAS group			Control group
Radiographic analysis	Within safe zone (n = 24)	Outliers (n = 6)	p value	Within safe zone (n = 13)	Outliers (n = 17)	p value
Amount of wear (mm)*	0.71 ± 0.62			0.77 ± 0.52		0.54
Amount of wear (mm)*	0.69 ± 0.55	0.76 ± 0.8	0.53	0.78 ± 0.55	0.75 ± 0.52	0.65
Linear wear (mm/year)*	0.07 ± 0.06			0.08 ± 0.05		0.45
Linear wear (mm/year)*	0.07 ± 0.05	0.08 ± 0.08	0.54	0.08 ± 0.05	0.08 ± 0.05	0.59
Cup tilt > 3° (number)	0			0		N/A
Cup tilt > 3° (number)	0	0	N/A	0	0	N/A
Radiographic osteolysis (number)	3 (10%)			1 (3%)		0.6
Radiographic osteolysis (number)	2 (8%)	1 (10%)	0.5	1 (7.5%)	0	N/A

* Mean ± SD; CAS = computer-assisted surgery; Within safe zone = cup orientation abduction angle of 40° ± 10° and an anteversion angle of 15° ± 10°; Outliers = cup orientation outside of the Lewinnek safe zone; N/A = no statistical analysis available.