Table 2.

Agreement between the insulinoma‐associated antigen‐2 by radioimmunoassay and the insulinoma‐associated‐2 by enzyme‐linked immunosorbent assay with sera from type 1 diabetes

Type 1 diabetic patients	n	RIA (+)	ELISA (+)	Agreement	κ statistics (95% CI)
Fulminant type 1 diabetes	38	0 (0%)	2 (5%)	94.7%	0.000 (0.000–0.000)
Acute‐onset type 1 diabetes	168	85 (51%)	77 (46%)	89.3%	0.786 (0.693–0.879)
SPIDDM	137	42 (31%)	37 (27%)	90.5%	0.769 (0.651–0.888)

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