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Table 3 Odd radios and 95% confidence interval of metabolic syndrome according to quartiles of ferritin: a binary logistic regression

From: High serum ferritin level is an independent risk factor for metabolic syndrome in a Chinese male cohort population

      OR (95% CI)  
Ferritin Cases (%) Unadjusted p1 Model 1 p2 Model 2 p3 Model 3 p4
1st Q 36(5.97%) Ref   Ref   Ref   Ref  
2nd Q 52(8.60%) 1.48(0.92-2.29) 0.08 1.61(1.03-2.52) 0.04 1.59(1.01-2.48) 0.04 1.27(0.77-2.08) 0.35
3rd Q 71(11.72%) 2.08(1.37-3.16) <0.01 2.21(1.44-3.37) <0.01 2.11(1.37-3.22) <0.01 1.32(0.83-2.12) 0.25
4th Q 148(24.54%) 5.12(3.48-7.52) <0.01 5.08(3.44-7.50) <0.01 4.90(3.31-7.26) <0.01 2.29(1.47-3.54) <0.01
P trend <0.01   <0.01   <0.01   <0.01  
  1. 1st Q: <221.4 ng/ml; 2nd Q: 221.4-318.7 ng/ml; 3rd Q: 318.8-459.9 ng/ml; 4th Q: >459.9 ng/ml.
  2. Model 1,Odds radio adjusted for age, model 2 plus model 1 and physical activity, family history of chronic diseases(4 covariates: hypertension, diabetes mellitus, stoke, coronary heart disease), lifestyle factor of alcohol drinking status and smoking status. model 3 further BMI.