From: Are component positioning and prosthesis size associated with hip resurfacing failure?
 |  |  |  | correlation between precision and experience | |
---|---|---|---|---|---|
 | Early group (n = 100) | Late group (n = 261) | p-value | coefficient | p value |
Mean anteroposterior stem-shaft angle in degrees (range) | 2 (-20 to 28) | 1 (-24 to 25) | 0.107 | 0.64 | < 0.001 |
Standard deviation of anteroposterior stem shaft angle in degrees | 7 | 5 | 0.012 | Â | Â |
Mean lateral stem-shaft angle in degrees (range) | 2 (-18 to 18) | 3 (-19 to 25) | 0.091 | 0.37 | < 0.001 |
Standard deviation of lateral stem shaft angle in degrees | 7 | 6 | 0.595 | Â | Â |
Mean acetabular cup inclination angle in degrees (range) | 35 (14 to 54) | 37 (18 to 65) | 0.036 | 0.12 | 0.027 |
Standard deviation of acetabular cup inclination angle in degrees | 8 | 7 | 0.275 | Â | Â |