Table 2

Adjusted ORs (95% CI) of having metabolic syndrome according to quintiles of plasma 25(OH)D concentrations

Quintiles of 25(OH)D
Ptrend
Q5: ≥57.7 nmol/lQ4: 45.6–57.6 nmol/lQ3: 36.9–45.5 nmol/lQ2: 28.8–36.8 nmol/lQ1: ≤28.7 nmol/l
No. cases/participants193/652248/653279/652326/653335/652
Model 11.00 (reference)1.31 (1.03–1.66)1.36 (1.07–1.73)1.67 (1.31–2.13)1.62 (1.26–2.08)<0.0001
Model 21.00 (reference)1.31 (1.02–1.66)1.38 (1.08–1.77)1.76 (1.37–2.26)1.64 (1.27–2.13)<0.0001
Model 31.00 (reference)1.28 (1.00–1.64)1.33 (1.03–1.71)1.71 (1.32–2.21)1.52 (1.17–1.98)0.0002
  • Model 1: adjusted for age, sex, geographic location (Beijing/Shanghai), residential region (urban/rural), and visit date (April or May/June). Model 2: further adjusted for education (≤6, 7–9, or ≥10 years in school), physical activity (low, moderate, or high), smoking (current, former, or never), alcohol drinking (yes/no), family history of CVD (yes/no) and diabetes (yes/no), and self-reported CHD (yes/no) and stroke (yes/no). Model 3: further adjusted for inflammatory factors (CRP and IL-6).