Table I.

Subject characteristics (weighted N=61,012,269; unweighted N=47,933)

	AD in last 12 months	No AD in last 12 months
Characteristic, weighted % (95% CI)	Weighted N = 7,284,818 (11.9%)	Weighted N = 53,727,451 (88.1%)
Sex
Male	49.1 (47.4–50.8)	51.1 (50.5–51.8)
Female	50.9 (49.2–52.6)	48.9 (48.2–49.5)
Age, y, mean (95% CI)	9.47 (9.33–9.61)	10.07 (10.01–10.12)
Birth weight, g, mean (95% CI)	3267.1 (3244.1–3290.1)	3293.7 (3284.9–3302.6)
Ethnicity
Non-Hispanic	80.1 (78.6–81.6)	75.1 (74.1–76.1)
Hispanic	19.9 (18.4–21.4)	24.9 (23.9–25.9)
Race
White	67.0 (65.1–68.7)	75.0 (74.2–75.8)
Black / African American	20.5 (18.9–22.1)	14.0 (13.4–14.6)
American Indian / Alaskan Native	0.8 (0.6–1.2)	1.2 (1.0–1.5)
Asian	5.4 (4.6–6.2)	5.4 (5.0–5.7)
Multiracial	6.4 (5.6–7.2)	4.4 (4.1–4.7)
Region
Northeast	15.9 (14.3–17.6)	16.4 (15.4–17.4)
Midwest	22.1 (20.5–23.7)	22.3 (21.4–23.2)
South	37.6 (35.5–39.7)	37.6 (36.3–38.9)
West	24.4 (22.6–26.4)	23.8 (22.6–24.9)
Annual household income, USD
$0–34,999	28.3 (26.7–30.0)	26.4 (25.6–27.1)
$35,000–74,999	26.0 (24.4–27.6)	26.3 (25.7–26.9)
$75,000–99,999	11.6 (10.6–12.7)	11.4 (11.0–11.8)
≥ $100,000	27.8 (26.1–29.6)	27.1 (26.3–27.9)
Not reported / unknown	6.3 (5.5–7.2)	8.9 (8.4–9.3)
Highest maternal education
Less than high school	10.1 (9.0–11.2)	13.6 (13.0–14.2)
High school graduate / GED	17.9 (16.7–19.2)	18.8 (18.3–19.4)
Some college, no degree	19.0 (17.7–20.3)	16.2 (15.7–16.8)
Associate degree	14.5 (13.3–15.8)	11.9 (11.5–12.3)
Bachelor degree	20.5 (19.0–22.0)	20.2 (19.5–20.8)
Master, professional, or doctoral degree	12.2 (11.1–13.5)	11.5 (11.0–12.0)
Not reported / unknown	5.8 (5.1–6.6)	7.8 (7.5–8.1)
Highest paternal education
Less than high school	7.8 (6.9–8.9)	11.0 (10.5–11.5)
High school graduate / GED	14.5 (13.4–15.6)	17.1 (16.6–17.7)
Some college, no degree	11.4 (10.4–12.6)	10.8 (10.3–11.3)
Associate degree	7.9 (7.0–8.9)	7.6 (7.2–7.9)
Bachelor degree	15.8 (14.5–17.2)	15.8 (15.2–16.4)
Master, professional, or doctoral degree	10.4 (9.3–11.5)	10.5 (10.0–11.1)
Not reported / unknown	32.3 (30.7–33.9)	27.2 (26.6–27.9)
Has health insurance coverage	95.5 (94.7–96.2)	94.2 (93.9–94.5)
General health status
Excellent	50.8 (49.0–52.5)	59.7 (58.9–60.4)
Very good	28.4 (26.9–30.0)	25.3 (24.8–25.9)
Good	17.6 (16.3–18.9)	13.6 (13.1–14.1)
Fair	2.8 (2.3–3.5)	1.2 (1.1–1.4)
Poor	0.4 (0.2–0.8)	0.18 (0.1–0.2)
History of asthma	26.4 (24.9–28.0)	13.0 (12.6–13.5)
History of hay fever or respiratory allergy in last 12 mon	32.9 (31.2–34.7)	14.7 (14.2–15.2)
History of food allergy in last 12 mon	16.7 (15.4–18.1)	4.3 (4.1–4.6)
History of attention deficit hyperactivity disorder	11.6 (10.5–12.8)	8.4 (8.1–8.8)
History of autism	3.3 (2.6–4.1)	1.9 (1.7–2.1)
History of any other developmental delay	6.2 (5.4–7.2)	3.2 (3.0–3.5)
History of learning disability	10.4 (9.3–11.6)	6.2 (5.8–6.5)

Data Source: NCHS, National Health Interview Survey, 2013–2017. AD, atopic dermatitis.