Metabolic Syndrome and Its Components Predict the Risk of Type 2 Diabetes Mellitus in the Mainland Chinese: A 3-Year Cohort Study

Table 3

Predictive value of baseline MetS and its components in predicting risk of T2DM at 3-year follow-up.

Variable	Male				Female
	Sensitivity (%)	Specificity (%)	PPV (%)	NPV (%)	Sensitivity (%)	Specificity (%)	PPV (%)	NPV (%)
Metabolic syndrome	36	88	31	90	23	96	31	94
Overweight	54	61	18	89	39	83	16	94
IGR	59	80	31	92	52	85	23	95
FBG ≥ 6.1 mmol/L	16	97	48	88	11	98	33	93
PG2h ≥ 7.8 mmol/L	56	81	32	92	50	86	23	95
Hypertension	50	70	21	90	42	86	19	95
Dyslipidemia	58	63	20	90	43	80	15	94
TG ≥ 1.7 mmol/L	64	63	22	92	48	85	21	95
Low HDLc	2	99	15	87	4	97	11	92

MetS: metabolic syndrome; T2DM: type 2 diabetes mellitus; PPV: positive predictive value; NPV: negative predictive value; IGR: impaired glucose regulation; FBG: fasting blood glucose; PG2h: 2-hour postprandial plasma glucose; TG: triglycerides; HDLc: high-density lipoprotein cholesterol. Overweight: defined as BMI greater than 25.0 kg/m²; hypertension: defined as systolic/diastolic blood pressure ≥ 140/90 mmHg or taking antihypertensive agents; low HDL cholesterol: defined as fasting HDL-C < 0.9 or< 1.0 mmol/L in males and females, respectively. Using bootstrap resampling (times = 500).