FIGURE 4.

Adjusted mean ± SE serum ferritin concentrations by Q of iron intake from meat stratified by sex and adjusted for age (years), BMI (in kg/m²), total iron intake (milligrams per day), and study cohort. Mean ± SD iron intakes from meat in each Q were as follows; women: 1, 0.2 ± 0.2 mg/d; 2, 0.8 ± 0.1 mg/d; 3, 1.3 ± 0.1 mg/d; 4, 1.9 ± 0.2 mg/d; and 5, 3.2 ± 1.2 mg/d; men, 1, 0.6 ± 0.3 mg/d; 2, 1.5 ± 0.2 mg/d; 3, 2.3 ± 0.2 mg/d; 4, 3.1 ± 0.3 mg/d; and 5, 5.0 ± 1.5 mg/d. P-trend values were calculated with the use of an ANCOVA. Q, quintile.