Table 1. Sample Size and Weighted Sample Characteristics by Food Security Status Among US Adults, 1999-2016^a.

Characteristic	% (95% CI)		P valueb
	Food secure group	Food insecure group
Unweighted sample, No.	38 027	8118	NA
Weighted sample, No.c	183 280 726	27 347 316	NA
BMI			<.001
Normal weight: <25	32.3 (31.4-33.2)	29.0 (27.3-30.7)
Overweight: 25-29.9	34.2 (33.5-34.9)	29.5 (28.0-30.9)
Obese: ≥30	33.5 (32.7-34.4)	41.5 (39.9-43.0)
WC, cm			.001
<High risk	49.3 (48.2-50.4)	46.3 (44.7-47.9)
High risk	50.7 (49.6-51.8)	53.7 (52.1-55.3)
Sex			.01
Women	51.8 (51.4-52.2)	53.5 (52.1-54.8)
Men	48.2 (47.8-48.6)	46.5 (45.2-47.9)
Race/ethnicity			<.001
Non-Hispanic White	72.1 (70.0-74.1)	46.8 (43.1-50.5)
Non-Hispanic Black	10.2 (9.0-11.3)	18.6 (16.4-20.7)
Hispanic	11.2 (9.8-12.7)	28.6 (25.4-31.7)
Otherd	6.6 (5.9-7.2)	6.1 (5.2-7.0)
Age, y			<.001
20-39	35.7 (34.7-36.8)	49.7 (47.8-51.6)
40-64	45.1 (44.2-45.9)	41.8 (40.2-43.4)
≥65	19.2 (18.5-19.9)	8.5 (7.6-9.4)
Educational level			<.001
≤High school	38.8 (37.4-40.3)	62.9 (61.1-64.8)
≥Some college	61.2 (59.7-62.6)	37.1 (35.2-38.9)
Poverty-to-income ratio (family)			<.001
≤130% FPL	21.7 (20.6-22.8)	61.1 (59.0-63.2)
>130% FPL	78.3 (77.2-79.4)	38.9 (36.8-41.1)
Marital status			<.001
Married	58.8 (57.7-59.9)	39.0 (37.1-40.9)
Not married	41.2 (40.1-42.3)	61.0 (59.1-62.9)

Abbreviations: BMI, body mass index (calculated as weight in kilograms divided by height in meters squared); FPL, federal poverty level; NA, not applicable; WC, waist circumference.

^aData from the National Health and Nutrition Examination Survey.¹⁷ Data are presented as percentage (95% CI) unless indicated otherwise.

^bCalculated with χ² tests to determine statistically significant differences between food security status groups.

^cData were weighted to be nationally representative.

^dOther race/ethnicity included groups other than non-Hispanic White, non-Hispanic Black, and Hispanic, such as multiracial.