Table 1.

Descriptive statistics: children age 6–16, NHANES III.

	Mean or proportion	Standard error
Age	11.1	(.10)
Household size	4.7	(.06)
Income (infl.-adjusted dollars)	$37,104.4	(1273.9)
Education of head (years)	12.5	(.13)
Female	49.0%
Race
Non-Hispanic white	67.8%
Non-Hispanic black	14.5%
Mexican American	8.3%
Other race/ethnic groups	9.4%
Infections – proportion seropositive
H. pylori	26.4%
CMV	38.5%
HSV-1	41.6%
HAV	9.9%
HBV	1.8%
Health outcomes
Asthma/Chronic bronchitis	14.8%
Height (age-specific z-scores)	.18	(.03)

Weighted, N=4,319.

Note: H. pylori=Helicobacter pylori, CMV=cytomegalovirus, HSV-1= Herpes simplex virus type 1, HAV=Hepatitis A virus, HBV=Hepatitis B virus.