Large-Vessel Vasculitis: Interobserver Agreement and Diagnostic Accuracy of 18F-FDG-PET/CT
Table 3
Average number of vasculitis PET/CT scores (individual observer scores), Fleiss’ kappa, sensitivity, and specificity (95%-CI) according to the different methods applied.
Method
Average number of vasculitides
Fleiss’ kappa
Sensitivity*
Specificity*
(I) First impression
9 (6, 9, 10, 11)
0,68
92% (52–98%)
90% (70–97%)
(IIa) Diffuse uptake, ≥liver uptake
16 (14, 16, 17, 18)
0,78
100% (61–100%)
60% (39–78%)
(IIb) Diffuse uptake, >liver uptake
7 (7, 7, 7, 8)
0,96
100% (61–100%)
98% (82–100%)
(III) Diffuse uptake, >femoral artery uptake
7 (6, 6, 6, 10)
0,81
80% (41–94%)
96% (79–99%)
The average sensitivity and specificity of the results of the 4 observers () were calculated.
