Table 2. Comparison of characteristics between the metabolic syndrome and normal groups.

Characteristics		Normal group (n = 1,513)	Metabolic syndrome group (n = 383)	P value
Age, yr		39.46 ± 0.37	45.05 ± 0.58	< 0.001a*
Sex				< 0.001b*
	Male	608 (75.0)	208 (25.0)
	Female	905 (84.7)	175 (15.3)
IOP, mmHg		15.33 ± 0.09	16.05 ± 0.15	< 0.001a*
No. of with ocular hypertension		24 (1.1)	9 (1.6)	0.527b
SBP, mmHg		112.94 ± 0.40	127.07 ± 0.86	< 0.001a*
DBP, mmHg		72.17 ± 0.28	81.92 ± 0.63	< 0.001a*
Glucose, mg/dL		94.85 ± 0.46	116.05 ± 1.73	< 0.001a*
Insulin, μIU/mL		7.83 ± 0.12	14.79 ± 0.55	< 0.001a*
HOMA-IR		1.86 ± 0.03	4.31 ± 0.18	< 0.001a*
BMI, kg/m2		23.25 ± 0.11	27.83 ± 0.22	< 0.001a*
WC, cm
	Male	85.01 ± 0.42	95.67 ± 0.60	< 0.001a*
	Female	75.49 ± 0.33	90.73 ± 0.77	< 0.001a*
Triglycerides, mg/dL		101.01 ± 1.95	229.08 ± 7.90	< 0.001a*
HDL-C, mg/dL
	Male	50.60 ± 0.44	41.05 ± 0.74	< 0.001a*
	Female	59.58 ± 0.49	46.36 ± 0.90	< 0.001a*

Values are presented as mean ± standard error or number (%), unless otherwise indicated.

IOP = intraocular pressure, SBP = systolic blood pressure, DBP = diastolic blood pressure, HOMA-IR = homeostasis model assessment of insulin resistance, BMI = body mass index, WC = waist circumference, HDL-C = high-density lipoprotein cholesterol.

^aThe t-test, ^bThe χ² test.

^*P < 0.05 was considered statistically significant.