Table 2 Accuracy of gap-balancer measurements compared with sensor data at two knee flexion angles
Statistical measure of performance | 0° mean (95% CI) | 90° mean (95% CI) | P values (angle comparison) |
|---|---|---|---|
Accuracy | 76.7% (65.7% ~ 87.7%) | 71.7% (59.9 ~ 83.4%) | 0.536 |
Sensitivity | 88.1% (75.0% ~ 94.8) | 82.2% (68.7 ~ 90.7%) | 0.448 |
Specificity | 50.0% (29.0% ~ 70.9%) | 40.0% (19.8 ~ 64.3%) | 0.580 |
PPV | 80.4% (68.5% ~ 92.4) | 80.4% (68.5 ~ 92.4%) | 1.000 |
NPV | 64.2% (35.6 ~ 93.0) | 42.9% (13.2 ~ 72.5%) | 0.272 |