Table 1.

Estimated Toxocara seroprevalence in the United States by age group and race/Hispanic origin in persons ≥ 6 years of age, NHANES 2011–2014

		entire study population (n=13509)	Non-Hispanic White (ref) (n=4972)	Non-Hispanic Black (n=3114)	Non-Hispanic Asian (n=1581)	Mexican American (n=2010)
age group	sample size	% (95% CI)	% (95% CI)	% (95% CI)	% (95% CI)	% (95% CI)
total	13509	5.1 (4.3, 5.9)	3.8 (3.0, 4.7)	6.7 (5.5, 8.1)+++	7.4 (5.9, 9.2)+++	6.1 (4.4, 8.3)+
6–11 (ref)	1758	3.0 (1.9, 4.5)	3.0 (1.4, 5.7)∫	3.5 (1.7, 6.4)	2.1 (0.4, 6.1)‡∫∫∫	3.0 (1.3, 5.9) ∫
12–19	2103	3.9 (2.9, 5.0)	2.8 (1.5, 4.5)	5.4 (3.4, 8.2)	4.4 (2.0, 8.2)∫	3.8 (1.9, 6.8)
20–29	1636	4.6 (3.3, 6.2)	2.6 (1.4, 4.5)	4.0 (1.9, 7.2)	4.0 (1.4, 8.8)‡∫	8.7 (4.8, 14.2)*
30–39	1686	4.8 (3.7, 6.0)*	3.6 (2.4, 5.3)	5.3 (3.1, 8.5)	4.5 (2.2, 8.0)	6.1 (3.1, 10.5)
40–49	1645	5.4 (4.2, 6.8)**	3.7 (2.2, 5.6)	6.4 (3.9, 9.7)	6.1 (3.4, 9.9)*	8.9 (5.1, 14.2)*
50–59	1592	6.4 (4.7, 8.6)**	5.3 (3.1, 8.6)	10.4 (7.5, 13.8)***	5.6 (2.0, 12.2)∫	6.8 (2.9, 13.3)∫
≥60	3089	5.7 (4.5, 7.1)**	4.1 (2.8, 5.7)	10.4 (8.0, 13.3)***	19.7 (13.9, 26.6)***	3.9 (2.0, 6.8)

^***P < 0.001,

^**<0.01,

^*<0.05 from a two sample t-test comparing each age group to the age 6–11 reference group

⁺⁺⁺P < 0.001,

⁺⁺<0.01,

⁺<0.05 from a two sample t-test comparing each race/Hispanic origin subgroup to the non-Hispanic White reference group for the total population

^†estimate with <10 degrees of freedom

^‡estimate based on <10 positive sample persons

^∫relative standard error (RSE) >30% and <40%,

^∫∫RSE >40% and <50%,

^∫∫∫RSE >50% and <60%.

Elevated RSE may result in unstable estimates.

95% confidence interval estimated by Korn and Graubard method [13]

Estimates are weighted to represent the total U.S. population and account for oversampling and nonresponse to the household interview and physical examination