Standardized Proportion (95% Confidence Interval) of Central Obesity, Overweight, and Obesity in Chinese Adults ≥20 Years, 2007–2008.

Abbreviation: BMI, body mass index; WC, Waist Circumference.
aCentral obesity was identified as waist circumference ≥90 cm in men and ≥85 cm.
bOverweight was identified as BMI ≥24 to <28 kg/m2.
cObesity was BMI ≥28 kg/m2.
dThe JCDCG-MetS was defined as three or more of the following abnormalities: 1. Central obesity (WC ≥90 cm for men and ≥85 cm for women); 2. Elevated TG (TG ≥1.7 mmol/L), or specific treatment for this lipid abnormality; 3. Reduced HDL-C (HDL-C <1.03 mmol/l), or specific treatment for this lipid abnormality; 4. Elevated BP (BP≥130/85 mmHg or current treatment for hypertension), or previously diagnosed hypertension; and 5. Elevated plasma glucose (FPG ≥6.1 mmol/L or 2 h PG ≥7.8 mmol/L) or previously diagnosed DM.
The percentage values were standardized by the direct method according to the Chinese population structure in 2006,
eadjusted for age and sex,
fadjusted for age.
gP value from multivariable logistic regression analysis (adjusted for age and the interaction of region * gender).
hP value for linear trend from Chi-Square test for Linear-by Linear Association.