Large-Vessel Vasculitis: Interobserver Agreement and Diagnostic Accuracy of ¹⁸F-FDG-PET/CT

Table 4

Average number of vasculitis PET/CT scores (individual observer scores), Cohen’s kappa, sensitivity, and specificity (95%-CI) according to the different methods applied.

Method	Average vasculitis score	Cohen’s kappa	Sensitivity^*	Specificity^*
(I) First impression	10 (9, 11)	0,85	100% (61–100%)	88% (67–96%)
(IIb) Diffuse uptake,; >liver uptake	6 (5, 7)	0,79	83% (46–95%)	100% (84–100%)
(III) Diffuse uptake,; >femoral artery uptake	7 (7, 7)	0,63	83% (44–97%)	93% (73–98%)

The average sensitivity and specificity of the results of the 2 observers () were calculated.