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Table 5 Adjusted odds ratios for the association between risk factors and serum 25(OH)D levels of < 10 ng/mL, 10 to < 20 ng/mL, and 20 to < 30 ng/mL compared with the reference group (≥ 30 ng/mL)

From: Non-association between low vitamin d levels and aeroallergen-positivity evaluated using multiple allergen simultaneous test in Korean adults

Variables Adjusted ORs (95% confidence interval) P for trend
Serum 25(OH)D ≥ 30 20 ≤ Serum 25(OH)D < 30 10 ≤ Serum 25(OH)D < 20 Serum 25(OH)D < 10
Sex (male) 1 2.212 (1.351–3.622) * 1.937 (1.204–3.117) * 0.470 (0.170–1.300)  < 0.001
Age group       < 0.001
 20–29 vs ≥ 60 1 N/A 2.171 (0.199–23.697) N/A  
 30–39 vs ≥ 60 1 3.656 (1.070–12.491) * 4.686 (1.422–15.441) * 11.736 (2.124–64.850) *  
 40–49 vs ≥ 60 1 4.496 (1.775–11.387) * 7.627 (3.135–18.557) * 13.978 (3.449–56.660) *  
 50–59 vs ≥ 60 1 3.187 (1.844–5.509) * 4.376 (2.577–7.431) * 5.868 (1.970–17.477) *  
Season      0.002
 Spring vs Winter 1 0.428 (0.223–0.821) * 0.510 (0.279–0.933) 0.423 (0.160–1.114)  
 Summer vs Winter 1 0.922 (0.470–1.809) 0.621 (0.321–1.202) 0.149 (0.037–0.599)*  
 Fall vs Winter 1 1.065 (0.540–2.103) 0.676 (0.347–1.320) 0.235 (0.065–0.844)*  
DEXA      0.274
 Normal vs Osteoporosis 1 1.037 (0.460–2.337) 1.770 (0.766–4.093) N/A  
 Osteopenia vs Osteoporosis 1 0.795 (0.341–1.853) 1.150 (0.481–2.751) N/A  
Diabetes mellitus 1 0.782 (0.420–1.458) 1.371 (0.770–2.442) 0.804 (0.211–3.066) 0.172
Hypertension 1 1.311 (0.755–2.275) 1.090 (0.638–1.860) 1.022 (0.333–3.135) 0.777
Hypercholesterolemia 1 0.741 (0.408–1.347) 0.834 (0.471–1.477) 0.435 (0.090–2.094) 0.615
MAST (Positive) 1 1.037 (0.642–1.674) 0.910 (0.573–1.445) 0.869 (0.298–2.539) 0.334
  1. DEXA dual energy X-ray absorptiometry, MAST multiple allergen simultaneous test
  2. *Multivariate logistic regression analyses, with P < 0.05 considered significant