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Table 3 Multiple logistic regression analysis for the association between serum 25(OH)D concentration and pterygium prevalence in the Korean population

From: Association between pterygium, sun exposure, and serum 25-hydroxyvitamin in a nationally representative sample of Korean adults

  Model 1 Model 2 Model 3
Serum 25(OH)D concentration, ng/mL
  > 30 1.519 (1.016–2.271) 1.515 (1.01–2.274) 1.565 (1.035–2.366)
 25–30 1.543 (1.097–2.168) 1.536 (1.091–2.163) 1.545 (1.086–2.198)
 20–25 1.819 (1.403–2.357) 1.806 (1.393–2.342) 1.8 (1.358–2.386)
 15–20 1.553 (1.248–1.933) 1.544 (1.238–1.925) 1.535 (1.216–1.938)
  < 15 1 1 1
Daily sun exposure, hours
  > 5 1.683 (1.337–2.117) 1.689 (1.342–2.126) 1.761 (1.395–2.223)
 2–5 1.126 (0.889–1.427) 1.126 (0.89–1.425) 1.129 (0.877–1.453)
  < 2 1 1 1
  1. 25(OH)D = 25-hydroxyvitamin D
  2. Model 1 = adjusted for age and regular exercise
  3. Model 2 = adjusted for Model 1 + body mass index, smoking, and drinking
  4. Model 3 = adjusted for Model 2 + diabetes, metabolic syndrome, hypertension, and stress