Table 2.

Interrater reliability and agreement in the full exercise (Round 2).

Variables	Mean Prevalence, %	Mean Agreement	Mean κ	Mean PABAK
US positive for GCA	62.5	0.93	0.86	0.86
Halo sign
Temporal arteries, all segments	33.3	0.82	0.60	0.65
Common superficial temporal artery	41.0	0.86	0.71	0.72
Frontal branch	31.3	0.79	0.50	0.58
Parietal branch	27.8	0.82	0.54	0.65
Axillary arteries	52.8	0.81	0.64	0.63
Compression sign
Temporal arteries, all segments	33.8	0.83	0.60	0.65
Common superficial temporal artery	38.2	0.83	0.63	0.65
Frontal branch	34.0	0.81	0.57	0.62
Parietal branch	29.2	0.84	0.60	0.68

GCA: giant cell arteritis; PABAK: prevalence-adjusted bias-adjusted kappa; US: ultrasound.