Table 3.
Evaluation of the diagnostic performance of PETRA-MRA and TOF-MRA for detecting stenosis >50% and stenosis >75% using DSA as a reference of the post-intervention.
| Post-operative | Detection of >50% stenosis | Detection of >75% stenosis | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
DSA
(+) |
DSA
(–) |
Sensitivity | Specificity | PPV | NPV |
DSA
(+) |
DSA
(–) |
Sensitivity | Specificity | PPV | NPV | |
| PETRA-MRA (+) |
7 | 3 | 87.5% (46.7–99.3)* |
87.5% (66.5–96.7) |
70% (35.4–91.9) |
95.5% (75.1–99.8) |
0 | 0 | 0 | 100% (86.7–100.0) |
0 | 100% (86.7–100.0) |
| PETRA-MRA (–) |
1 | 21 | 0 | 32 | ||||||||
| TOF-MRA (+) |
8 | 24 | 100.0% (59.8–100.0) |
0 (0–17.2) |
25% (12.1–43.8) |
0 | 0 | 22 | 0 | 31.3% (16.7–50.1) |
0 (0–18.5) |
100.0% (65.5–100.0) |
| TOF-MRA (–) |
0 | 0 | 0 | 10 | ||||||||
*
95% confidence interval shown. PPV, positive predictive value; NPV, negative predictive value.