Table 2.
Diagnostic validity of AP radiographs, WP radiographs, CT, and MRI compared with intraoperative findings (n = 50)
| AP (95% CI) | WP (95% CI) | CT (95% CI) | MRI (95% CI) | |
| Sensitivity | 0.44 (0.21-0.69) | 0.67 (0.41-0.86) | 0.89 (0.65-0.98) | 0.94 (0.71-0.99) |
| Specificity | 0.65 (0.46-0.81) | 0.72 (0.53-0.86) | 0.69 (0.50-0.83) | 0.63 (0.45-0.80) |
| PPV | 0.42 (0.26-0.59) | 0.57 (0.41-0.71) | 0.61 (0.48-0.73) | 0.59 (0.47-0.70) |
| NPV | 0.68 (0.56-0.77) | 0.79 (0.65-0.88) | 0.91 (0.74-0.97) | 0.95 (0.74-0.99) |
| Accuracy | 0.58 (0.43-0.72) | 0.70 (0.55-0.82) | 0.76 (0.61-0.86) | 0.74 (0.60-0.86) |
| DOR | 1.53 (0.46-4.97) | 5.12 (1.46-17.78) | 17.60 (3.38-91.56) | 27.6 (3.21-237.83) |
| LR + | 1.26 (0.64-2.61) | 2.40 (1.25-4.51) | 2.87 (1.66-4.88) | 2.54 (1.63-4.33) |
| LR - | 0.86 (0.52-1.37) | 0.46 (0.23-0.92) | 0.16 (0.04-0.61) | 0.09 (0.01-0.62) |
| AUC | 0.55 (0.39-0.72) | 0.69 (0.54-0.85) | 0.79 (0.66-0.92) | 0.83 (0.70-0.94) |
| p value a | 0.69 | 0.02 | < 0.001 | < 0.001 |
| Cramer V | 0.48 (p = 0.10) | 0. 37 (p < 0.01) | 0.55 (p < 0.01) | 0.67 (p < 0.01) |
a
The p values represent the comparison of each imaging modality (AP, WP, CT, and MRI) against the arthroscopic findings; the Cramer V test describes the strength of the correlation between the results of each diagnostic imaging against arthroscopic findings; WP = West Point; PPV = positive predictive value; NPV = negative predictive value; DOR = diagnostic odds ratio; LR + = positive likelihood ratio; LR- = negative likelihood ratio; AUC = area under the curve.