Table 3—

ORs for type 2 diabetes associated with hemoglobin and serum ferritin in a sample of Chinese adults (n = 2,849)

Quartile 4 vs. 1–3 of hemoglobinQuartile 4 vs. 1–3 of serum ferritin
Men
    Model 1*2.23 (1.14–5.35)1.80 (0.92–3.53)
    Model 21.86 (0.94–3.67)1.40 (0.70–2.80)
    Model 31.66 (0.82–3.35)1.26 (0.61–2.60)
    Model 4§1.65 (0.80–3.94)1.06 (0.50–2.23)
    Model 51.74 (0.83–3.63)1.08 (0.50–2.33)
    Model 61.86 (0.88–3.92)1.09 (0.51–2.35)
    Model 7#1.75 (0.71–4.27)1.09 (0.51–2.35)
Women
    Model 1*2.75 (1.45–5.23)4.16 (2.04–8.45)
    Model 22.45 (1.27–4.70)3.93 (1.92–8.05)
    Model 32.32 (1.18–4.55)3.92 (1.89–8.13)
    Model 4§2.07 (1.03–4.15)3.94 (1.83–8.49)
    Model 52.12 (1.04–4.33)4.07 (1.86–8.90)
    Model 62.15 (1.03–4.51)3.79 (1.72–8.36)
    Model 7#2.69 (0.98–7.39)4.59 (1.49–14.13)
Both sexes
    Model 8**1.97 (1.18–3.28)1.98 (1.19–3.29)
  • Data are OR (95% CI).

  • *

    * Adjusted for age.

  • Adjusted for age, BMI (continuous), central obesity (waist circumference: men ≥90 cm, women ≥80 cm).

  • Adjusted for age, BMI (continuous), central obesity, smoking (never, past, and current smoking of 1–19 or ≥20 cigarettes/day), drinking (0 times/week, 1–2 times/week, 3–4 times/week, or daily), family history of diabetes in any of three generations (siblings, parents, or grandparents), high blood pressure (diastolic blood pressure ≥90 mmHg and/or systolic blood pressure ≥140 mmHg or using antihypertensive drugs).

  • §

    § Adjusted for variables in model 3 and urban, income (low, medium, high), job (manual, non-manual), and education.

  • Adjusted for variables in model 4 and intake of iron (quartiles), energy, protein, and fat.

  • Adjusted for variables in model 5 and high hemoglobin (fourth quartile) and high serum ferritin (fourth quartile).

  • #

    # Adjusted for variables in model 6 and after excluding 51 participants with known diabetes.

  • **

    ** Adjusted for variables in model 6 and sex. In this model, sex was not significant, but family history of diabetes yields an OR of 3.86 (95% CI 1.82–8.16).