BioMed Research International / 2015 / Article / Tab 3

Research Article

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.

MethodAverage number of vasculitides Fleiss’ kappaSensitivity*Specificity*

(I) First impression9 (6, 9, 10, 11)0,6892% (52–98%)90% (70–97%)

(IIa) Diffuse uptake,
≥liver uptake
16 (14, 16, 17, 18)0,78100% (61–100%)60% (39–78%)

(IIb) Diffuse uptake,
>liver uptake
7 (7, 7, 7, 8)0,96100% (61–100%)98% (82–100%)

(III) Diffuse uptake,
>femoral artery uptake
7 (6, 6, 6, 10)0,8180% (41–94%)96% (79–99%)

The average sensitivity and specificity of the results of the 4 observers () were calculated.