Table 1.

Diagnosis criteria of metabolic syndrome used in current study

MetS component	Modified ATP III criteria	IDF criteria	Harmonised definition
Number of risk factors	Three or more of…	Obesity and 2 of…	Three or more of…
Obesity	WC ≥90 cm for Asian-origin male WC ≥80 cm for Asian-origin female	WC ≥90 cm for Chinese male WC ≥80 cm for Chinese female	WC ≥85 cm for Chinese male WC ≥80 cm for Chinese female
Dyslipidaemia
TAG	≥1·7 mmol/l or drug treatment for elevated TAG	≥1·7 mmol/l or specific treatment for this lipid abnormality	≥1·7 mmol/l or drug treatment for elevated TAG
HDL	<1·03 mmol/l in men or <1·29 mmol/l in women or drug treatment for reduced HDL-cholesterol	<1·03 mmol/l in men or <1·29 mmol/l in women or specific treatment for this lipid abnormality	<1·03 mmol/l in men or <1·29 mmol/l in women or drug treatment for reduced HDL-cholesterol
Blood pressure	SBP ≥130 mmHg or/and DBP ≥85 mmHg or drug treatment for hypertension	SBP ≥130 mmHg or/and DBP ≥85 mmHg or treatment of previously diagnosed hypertension	SBP ≥130 mmHg or/and DBP ≥85 mmHg or drug treatment for hypertension
Hyperglycaemia	FBG ≥5·6 mmol/l or drug treatment for elevated glucose	FBG ≥5·6 mmol/l or previously diagnosed T2DM	≥5·6 mmol/l or drug treatment for elevated glucose

SBP, systolic blood pressure; DBP, diastolic blood pressure; FBG, fasting blood glucose.