Table 2 Difference between planned or (intraoperative) estimated and achieved component position with reference to 10 degree outlier cut-off

 Difference between planned and achieved anteversion over 10° (n, % of valid group)

5 (20)

1 (4)

5

 Difference between planned and achieved abduction over 10° (n, % of valid group)

4 (16)

2 (8)

2

 Difference between planned and achieved femoral version over 10° (n, % of valid group)

8 (32)

3 (12)

2.7

 Difference between planned and achieved acetabular anteversion OR abduction over 10° (n, % of valid group)

7 (28)

3 (12)

2.3

 Difference between planned and achieved any angle of acetabular or femoral orientation over 10° (n, % of valid group)

11 (44)

5 (19)

2.3

 Difference between estimated and achieved anteversion over 10° (n, % of valid group)

6 (24)

1 (4)

6

 Difference between estimated and achieved abduction over 10° (n, % of valid group)

4 (16)

1 (4)

4

 Difference between estimated and achieved femoral anteversion over 10° (n, % of valid group)

7 (26)

1 (4)

7

 Difference between estimated and achieved acetabular anteversion OR abduction over 10° (n, % of valid group)

8 (32)

2 (8)

4

 Difference between estimated and achieved any angle of acetabular or femoral orientation over 10° (n, % of valid group)

12 (48)

3 (12)

4