Table 5.

Sensitivity analysis of kappa agreements for self-reported type 1 (age at diagnosis: <35 years) and type 2 diabetes diagnoses (age at diagnosis: >44 years).

Diabetes type	Test study	Retest study	Consistency (%)a	Kappa (95% CI)
	Cases in 1991 (n)	Cases in 1998 (n)
Type 1 diabetesb	88	81	68/88 (77.3)	0.80 (0.65–0.95)
Type 2 diabetesc	12	15	6/12 (50.0)	0.52 (0.27–0.77)
	Cases in 1991 (n)	Cases in 2005 (n)
Type 1 diabetesb	88	74	54/88 (61.4)	0.69 (0.51–0.88)
Type 2 diabetesc	12	12	3/12 (25.0)	0.33 (0.05–0.61)
	Cases in 1998 (n)	Cases in 2005 (n)
Type 1 diabetesb	81	74	57/81 (70.4)	0.60 (0.38–0.81)
Type 2 diabetesc	129	123	75/129 (58.1)	0.63 (0.56–0.70)

CI: confidence interval.

^a$\mathrm{Consistency}(\%)=\frac{\mathrm{Number\; of\; diabetes\; diagnosis\; in\; both\; test\; and\; retest\; study}}{\mathrm{Number\; of\; diabetes\; diagnosis\; in\; test\; study}}\times 100$.

^bOnly those reporting age at diagnosis <35 years were included.

^cOnly those reporting age at diagnosis >44 years were included.