Table 7.

Kappa agreements for self-reported diabetes diagnoses (excluding gestational diabetes) stratified by BMI.

		Test study	Retest study	Consistency (%)a	Kappa (95% CI)
		Cases in 1991 (n)	Cases in 1998 (n)
	Normal weight (<25 kg/m2)	62b	62	49/62 (79.0)	0.79 (0.71–0.87)
BMI	Overweight (25–29.9 kg/m2)	44b	48	35/44 (79.5)	0.76 (0.66–0.86)
	Obese (⩾30 kg/m2)	41b	41	29/41 (70.7)	0.70 (0.59–0.82)
		Cases in 1991 (n)	Cases in 2005 (n)
	Normal weight (<25 kg/m2)	62b	59c	44/62 (80.0)	0.73 (0.64–0.82)
BMI	Overweight (25–29.9 kg/m2)	44b	35c	21/44 (47.7)	0.53 (0.40–0.66)
	Obese (⩾30 kg/m2)	41b	35c	25/41 (61.0)	0.65 (0.53–0.78)
		Cases in 1998 (n)	Cases in 2005 (n)
	Normal weight (<25 kg/m2)	99d	89e	74/99 (74.7)	0.79 (0.72–0.85)
BMI	Overweight (25–29.9 kg/m2)	99d	83e	59/99 (59.6)	0.65 (0.56–0.73)
	Obese (⩾30 kg/m2)	114d	106e	74/114 (64.9)	0.79 (0.72–0.85)

CI: confidence interval; BMI: body mass index.

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

^bThe numbers do not add up to 148 due to missing values on height or weight (consequently on BMI).

^cThe numbers do not add up to 130 due to missing values on height or weight (consequently on BMI).

^dThe numbers do not add up to 315 due to missing values on height or weight (consequently on BMI).

^eThe numbers do not add up to 282 due to missing values on height or weight (consequently on BMI).