Table 2.
Evaluation of the diagnostic performance of PETRA-MRA and TOF-MRA for detecting stenosis >50% and stenosis >75% using DSA as reference for the pre-intervention evaluation.
| Pre-operative | Detection of >50% stenosis | Detection of >75% stenosis | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
DSA
(+) |
DSA
(-) |
Sensitivity | Specificity | PPV | NPV |
DSA
(+) |
DSA
(–) |
Sensitivity | Specificity | PPV | NPV | |
| PETRA-MRA (+) |
23 | 0 | 95.8% (76.9–99.8)* |
100.0% (85.4–100.0) |
100.0% (82.2–100.0) |
96.7% (80.9–99.8) |
11 | 1 | 100.0% (67.9–100.0) |
97.6% (85.9–99.9) |
91.7% (59.8–99.6) |
100.0% (89.3–100.0) |
| PETRA-MRA (–) |
1 | 29 | 0 | 41 | ||||||||
| TOF-MRA (+) |
23 | 6 | 95.8% (76.9–99.8) |
79.3% (59.7–91.3) |
79.3% (59.7–91.3) |
95.8% (76.9–99.8) |
11 | 4 | 100.0% (67.9–100.0) |
90.5% (76.5–96.9) |
73.7% (44.8–91.1) |
100.0% (88.6–100.0) |
| TOF-MRA (–) |
1 | 23 | 0 | 38 | ||||||||
*
95% confidence interval shown.
PPV, positive predictive value; NPV, negative predictive value.