. 2017 Oct 25;106(Suppl 6):1640S–1646S. doi: 10.3945/ajcn.117.155978

TABLE 2.

Demographics and prevalence estimates of ID, based on TBI, and the prevalence of IDA, based on TBI and hemoglobin, among US nonpregnant females aged 15–49 y from NHANES 2007–2010¹

	Demographic characteristics
	n	% (95% CI)	Prevalence of ID based on TBI,² % (95% CI)	Prevalence of IDA based on TBI and low hemoglobin concentrations,² % (95% CI)
Total	3418	—	10.4 (9.3, 11.5)	5.0 (4.2, 5.8)
Survey years
2007–2008	1566	49.6 (45.2, 54.1)	11.3 (9.8, 12.9)^a	5.2 (3.9, 6.6)^a
2009–2010	1852	50.4 (45.9, 54.8)	9.4 (7.9, 10.9)^b	4.8 (4.0, 5.7)^a
Age, y
15–19	636	13.5 (11.9, 15.1)	10.8 (7.8, 13.8)^a	5.2 (3.0, 7.4)^a,b
20–34	1299	39.7 (37.1, 42.2)	8.8 (7.1, 10.5)^a	3.7 (2.9, 4.6)^a
35–49	1483	46.8 (44.7, 49.0)	11.6 (9.7, 13.4)^a	6.1 (4.7, 7.5)^b
Parity
0	522	27.0 (24.9, 29.1)	8.7 (6.3, 11.1)^a	4.8 (3.0, 6.6)^a,b
1	423	18.7 (16.6, 20.8)	7.4 (4.3, 10.5)^a	3.0 (1.5, 4.5)^a
≥2	1364	54.3 (51.8, 56.8)	12.3 (10.5, 14.1)^b	6.1 (4.9, 7.3)^b
Race/ethnicity
NH white	1425	63.7 (58.0, 69.4)	8.3 (6.8, 9.8)^a	3.0 (2.3, 3.8)^a
NH black	658	13.0 (10.4, 15.5)	15.7 (12.8, 18.5)^b	11.8 (9.6, 14.0)^b
Mexican American	705	9.9 (6.9, 12.9)	14.4 (12.3, 16.5)^b	8.5 (6.8, 10.3)^c
Other	630	13.5 (10.4, 16.6)	12.1 (7.8, 16.4)^a,b	5.4 (2.2, 8.6)^a,c
Family income
<130% of poverty:income ratio	1265	27.9 (24.8, 31.0)	11.8 (9.4, 14.3)^a	6.1 (4.4, 7.9)^a
≥130% of poverty:income ratio	1884	72.1 (69.0, 75.2)	9.8 (8.4, 11.1)^a	4.6 (3.7, 5.4)^a

ID was defined as TBI <0 mg/kg, and IDA was defined as TBI <0 mg/kg and hemoglobin <120 g/L. ID, iron deficiency; IDA, iron deficiency anemia; NH, non-Hispanic; TBI, total-body iron stores.

All analyses were weighted and took into account the complex survey design. Within a group, values with different superscript letters had significantly different prevalence estimates (logistic regression, P < 0.05).