Table 2.

The difference between self-reported and measured (SR-DM) height, weight, BMI, and WC by BMI categories and WC categories in Jiangsu, China

		Height (cm)			Weight (kg)			BMI (kg/m2)			WC (cm)
		n	Mean	95 % CI	n	Mean	95 % CI	n	Mean	95 % CI	n	Mean	95 % CI
Measured BMI categories	Underweight	128	0.4	−0.1,0.9	137	2.0	0.8,3.2	118	0.5	−0.1,1.0	72	1.0	0.2,1.8
	Normal	2247	0.9	0.8,1.0	2536	0.4	0.2,0.6	2156	−0.1	−0.2,0.0	1380	−0.8	−1.0,−0.5
	Overweight	1931	1.2	1.1,1.4	2301	−0.2	−0.4,0.0	1860	−0.5	−0.6,−0.4	1292	−2.0	−2.3,−1.7
	Obesity	731	1.7	1.3,2.1	893	−1.3	−1.6,−1.0	695	−1.2	−1.4,−1.0	525	−2.6	−3.1,−2.1
	P value	< 0.001			< 0.001			< 0.001			< 0.001
Measured WC	Normal	3306	1.1	0.9,1.3	3771	0.3	0.1,0.5	2615	−0.2	−0.3,−0.1	2084	−0.2	−0.4,−0.0
	Elevated	1731	1.2	1.0,1.4	2095	−0.4	−0.6,−0.2	2214	−0.6	−0.7,−0.5	1185	−2.8	−3.0,−2.6
	P value	0.137			< 0.001			< 0.001			< 0.001

Abbreviations BMI body mass index, WC waist circumference, CI confidence interval, SR self-reported, DM directly measured