Table 3.

Cohen’s kappa coefficient for interobserver agreement and intersequence agreement of additional active inflammatory findings

		Interobserver agreement		Intersequence agreement
		STIR & T2FS	T1CE	Observer 1	Observer 2
Synovitis	Right SIJ	0.783	0.867	0.498	0.569
	Left SIJ	0.832	0.780	0.498	0.476
Capsulitis	Right SIJ	0.950	0.742	0.612	0.796
	Left SIJ	0.897	0.793	0.614	0.731
Enthesitis	Right SIJ	0.733	0.822	0.330	0.461
	Left SIJ	0.822	0.785	0.371	0.374

SIJ, sacroiliac joint; STIR, short tau inversion recovery; T1CE, contrast-enhanced fat-saturated T₁ weighted imaging; T2FS, fat-saturated T₂ weighted imaging.