Central obesity is important but not essential component of the metabolic syndrome for predicting diabetes mellitus in a hypertensive family-based cohort. Results from the Stanford Asia-pacific program for hypertension and insulin resistance (SAPPHIRe) Taiwan follow-up study

Table 2 The baseline characteristics of study subjects categorized by central obesity

	With central obesity	Without central obesity	P
No. of patients	234	361
Male gender, n (%)	105 (44.9%)	169 (46.8%)	0.755
Age (years)	50.0±9.4	46.9±8.0	<0.001
Smoking (packs/day)	6.4±11.8	3.6±8.5	<0.001
Waist circumference (cm)	91.9±7.3	77.4±7.0	<0.001
Systolic BP (mmHg)	135±25	123±25	<0.001
Diastolic BP (mmHg)	79±14	75±14	<0.001
Fasting glucose (mmol/L)	5.1±0.6	4.9±0.5	<0.001
Triglyceride (mmol/L)	1.5±0.8	1.3±0.8	<0.001
HDL cholesterol (mmol/L)	1.1±0.3	1.2±0.3	<0.001
HOMA-IR	2.1±1.3	1.3±0.9	<0.001
Incidence of diabetes (per 1000person-years)	55.7	30.0	0.009

Abbreviations: BP= blood pressure, HDL= high-density lipoprotein, HOMA-IR= homeostasis model assessment for insulin resistance.