Table 3.
Statistically optimal segment-specific cut-offs.
| Number of patients/segments | Cut-off (mm) | AUC (95% CI) | Sensitivity | Specificity | Positive LR | Negative LR | Correctly classified | |
|---|---|---|---|---|---|---|---|---|
| CSTA | 101/159 | 0.86 | 0.92 (0.86–0.97) | 86.2% (75.1–92.8%) | 93.1% (86.4–96.6%) | 12.44 (6.04–25.61) | 0.15 (0.08–0.28) | 90.6% (85.0–94.2%) |
| TA frontal branch | 129/241 | 0.68 | 0.96 (0.94–0.98) | 93.3% (86.8–96.7%) | 88.3% (81.9–92.7%) | 7.99 (5.02–12.69) | 0.08 (0.04–0.16) | 90.5% (86.1–93.6%) |
| TA parietal branch | 117/209 | 0.67 | 0.90 (0.85–0.95) | 76.2% (65.9–84.2%) | 95.3% (90.2–97.9%) | 16.39 (7.43–36.15) | 0.25 (0.17–0.37) | 88.0% (82.9–91.8%) |
| Overall a | 133 b /609 | 0.68 | 0.92 (0.89–0.94) | 86.4% (81.5–90.1%) | 85.3% (81.3–88.5%) | 5.87 (4.57–7.55) | 0.16 (0.12–0.22) | 85.7% (82.7–88.3%) |
Cut-offs for the compressed lumen technique (combining both walls), calculated using method by Youden.
a
all segments combined.
b
11 Patients with giant cell arteritis had a normal T1-BB-MRI for all segments and were not included in this analysis. AUC; area under the curve; CSTA, common superficial temporal artery; LR, likelihood ratio; TA, temporal artery.