Table 2 Measurement accuracy of the cup position with INS and a goniometer.

From: Measurement accuracy of the acetabular cup position using an inertial portable hip navigation system with patients in the lateral decubitus position

 

Measurement error (INS)

Absolute difference between cup angles measured by a goniometer and postoperatively measured angles

p value

Cup abduction

2.8° ± 2.6°

3.1° ± 3.0°

0.537

Cup anteversion

3.9° ± 2.9°

6.1° ± 4.6°

 < 0.001

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