Table 3. Diagnosis by characteristics for the Kaiser score and BI-RADS based on DCE-MRI.
| Classification | Group | Sensitivity (%) | Specificity (%) | PPV (%) | NPV (%) | DAc# | 95% CI | P value |
|---|---|---|---|---|---|---|---|---|
| BPE degree | All lesions (n=126) | 0.001* | ||||||
| Kaiser score | 95.3 | 87.5 | 94.3 | 89.7 | 0.928 | 0.883–0.973 | ||
| BI-RADS | 96.5 | 46.3 | 79.8 | 90.4 | 0.810 | 0.741–0.879 | ||
| Moderate BPE lesions (n=93) | 0.007* | |||||||
| Kaiser score | 95.2 | 93.6 | 96.7 | 90.6 | 0.946 | 0.901–0.991 | ||
| BI-RADS | 96.8 | 54.8 | 81.1 | 89.5 | 0.828 | 0.752–0.904 | ||
| Marked BPE lesions (n=33) | 0.125 | |||||||
| Kaiser score | 95.8 | 66.7 | 88.5 | 85.7 | 0.879 | 0.767–0.991 | ||
| BI-RADS | 95.8 | 22.2 | 76.7 | 66.7 | 0.758 | 0.611–0.905 | ||
| Enhancement type | Mass lesions (n=95) | 0.006* | ||||||
| Kaiser score | 95.7 | 92.0 | 97.1 | 88.4 | 0.947 | 0.902–0.992 | ||
| BI-RADS | 96.5 | 47.5 | 79.8 | 86.4 | 0.821 | 0.782–0.860 | ||
| Non-mass enhancement lesions (n=25) | 0.125 | |||||||
| Kaiser score | 93.8 | 88.9 | 93.8 | 88.9 | 0.920 | 0.814–1.026 | ||
| BI-RADS | 100.0 | 55.6 | 80.0 | 100.0 | 0.840 | 0.697–0.983 | ||
*, significantly different; #, determined as (true positive + true negative)/all. BI-RADS, Breast Imaging Reporting and Data System; DCE-MRI, dynamic contrast-enhanced magnetic resonance imaging; PPV, positive predictive value; NPV, negative predictive value; CI confidence interval; DAc, diagnostic accuracy; BPE, background parenchymal enhancement.