Table 1: Consent to biospecimen research among 2012 NHANES participants aged 20 years or more by demographic categories.

Variable%

Consent
 Yes552999.4
Gender
 Female (reference)282049.28
 Male274050.72
Education
 Less than 9th grade5509.89
 9–11th grade78214.06
 High school/GED or equivalent116921.03
 Some college or AA degree165729.80
 College graduate or above139725.13
 Refused20.04
 Do not Know30.05
Race
 Mexican-American5409.7
 Other Hispanics57810.4
 Non-Hispanic White (reference)204136.7
 Non-Hispanic Black145526.2
 Non-Hispanic Asian74914.3
 Multiracial/other race1522.7
Age
 20–39 years195735.2
 40–59 years181232.6
 60+ years (reference)179132.2