Table 2.

Bivariate analysis of risk factors for iron deficiency by the ferritin model versus the body iron model^a

Risk Factor	Ferritin Model		Body Iron Model
	OR (95% CI)b	P value	OR (95% CI)	P value
Age ≥ 16 years	1.48 (1.04, 2.11)	0.03	1.93 (1.19, 3.11)	0.007
Years since menarche ≥ 3	1.51 (0.89, 2.55)	0.13	2.36 (1.33, 4.19)	0.003
Non-white race	1.88 (1.31, 2.70)	0.001	1.61 (1.01, 2.56)	0.04
Born outside of the United States	1.92 (1.05, 3.50)	0.03	1.60 (0.80, 3.19)	0.19
Treatment for anemia in the past 3 months	2.91 (1.17, 7.22)	0.02	2.12 (0.98, 4.57)	0.06
Self-report of physical activity compared with peers (about the same/more vs. less)	2.19 (1.31, 3.68)	0.003	1.62 (0.84, 3.10)	0.15
Past pregnancy	1.85 (0.78, 4.39)	0.17	2.46 (1.00, 6.10)	0.05
Household worried run out of food (sometimes/often true vs. never true)	1.55 (1.03, 2.32)	0.04	1.84 (1.11, 3.06)	0.02
Household food security (marginal/low/very low vs. full)	1.44 (1.00, 2.08)	0.05	1.45 (0.89, 2.37)	0.14
Drink coffee	1.38 (0.79, 2.42)	0.25	2.06 (1.11, 3.81)	0.02
Spanish language of interview	3.10 (1.70, 5.67)	<0.001	1.87 (0.69, 5.04)	0.22
Medroxyprogesterone acetate injection	0.44 (0.22, 0.88)	0.02	0.60 (0.25, 1.47)	0.26
Family income < $20,000/year	1.61 (1.09, 2.38)	0.02	1.43 (0.93, 2.17)	0.11
Eat any type of chicken or turkey >1 time per week	1.32 (0.87, 2.00)	0.19	1.69 (0.99, 2.90)	0.06

^aUnweighted N=1765.

^bOR=odds ratio, CI=confidence interval