Table 2.

Agreement between the RIA‐GADA and the ELISA‐GADA with sera from type 1 diabetes

Patients	n	RIA+ (%)	ELISA+ (%)	Agreement (%)	κ statistics (95% CI)
Acute‐onset type 1 diabetes	199	147 (74)	153 (77)	87.9	0.675 (0.556–0.795)
SPIDDM	168	124 (74)	106 (63)	72.6	0.374 (0.230–0.519)
Fulminant type 1 diabetes	48	8 (17)	4 (8)	79.2	0.063 (−0.240–0.365)

Data are n (%).

CI, confidence interval; ELISA, enzyme‐linked immunosorbent assay; RIA, radioimmunoassay; SPIDDM, slowly progressive type 1 diabetes.