Table 2.

Serum 25(OH)D levels by subject characteristics (n = 5,483)

Variable	Category	25(OH)D (ng/ml) (Mean ± SD)	p value
Age (year)	20–29	14.66 ± 4.62	<0.001
	30–39	15.77 ± 4.94
	40–49	16.13 ± 5.02
	50–59	17.52 ± 5.50
	60–69	18.52 ± 6.10
	70–79	18.23 ± 6.19
	≥80	18.33 ± 6.07
Gender	Male	17.94 ± 5.59	<0.001
	Female	16.27 ± 5.55
Body mass index (kg/m2)	<25	16.51 ± 5.17	0.015
	≥25	17.02 ± 5.83
Total cholesterol (mg/dl)	<200	16.84 ± 5.76	0.021
	≥200	17.21 ± 5.37
Waist measurement (cm)	Normalα	16.96 ± 5.69	0.628
	Abdominal obesityβ	17.03 ± 5.51
Triglyceride (mg/dl)	Normalγ	17.02 ± 5.73	0.352
	Elevated triglycerideδ	16.87 ± 5.36
HDL-cholesterol (mg/dl)	Normalε	17.11 ± 5.61	0.017
	Reduced HDL-Cζ	16.74 ± 5.65
Fasting blood sugar (mg/dl)	Normalη	17.63 ± 5.84	<0.001
	Elevated FBSθ	16.69 ± 5.51
Blood pressure (mm/Hg)	Normalκ	16.89 ± 5.61	0.004
	Elevated blood pressureλ	17.45 ± 5.70

^αWM <90 cm in male or <80 cm in female, ^βWM ≥90 cm in male or ≥80 cm in female, ^γTG <150 mg/dl, ^δTG ≥150 mg/dl, ^εHDL-C ≥40 mg/dl in male or ≥50 mg/dl in female, ^ζHDL-C <40 mg/dl in male or <50 mg/dl in female, ^ηFBS <100 mg/dl, ^θFBS ≥100 mg/dl, ^κSBP <130 mmHg or DBP <85 mmHg, ^λSBP ≥130 mmHg or DBP ≥85 mmHg.