Table 2. Results of two multiple logistic regressions examining demographic factors related to survey respondents’ support for the national cohort study, and their willingness to participate in the study if asked (n = 2,601).

Each multiple logistic regression included independent covariates for gender, self-identified race and ethnic group, survey language (among Hispanics only), age, household income, educational attainment, residence within or outside a metropolitan statistical area, and identification as either lesbian, gay, bisexual or transgender. For purposes of the analysis, race and ethnicity was treated as a categorical variable, using dummy variables for black non-Hispanics, Hispanics, and other non-white, non-Hispanics. Education, household income, and age were each treated as 4-level variables using the categories shown below. To examine whether there were differences among Hispanics who took the survey in Spanish and English, separate regressions were conducted using Hispanic respondents’ data only, adjusting for all of the variables below except for race and ethnic group.

	Demographic Group	Weighted N	% who said the study definitely or probably should be done	Beta	S.E.	p-value	% definitely or probably willing to participate in hypothetical biobank	Beta	S.E.	p-value
Total		2,601	79%				54%
Gender	Men	1,251	77%	-0.160	0.098	0.10	54%	0.007	0.080	0.93
	Women	1,350	80%	ref			54%	ref
Race and Ethnic Group	White, non-Hispanic	1,721	79%	ref			53%	ref
	Black, non-Hispanic	296	77%	-0.032	0.156	0.84	55%	0.100	0.131	0.44
	Hispanic (all races)	385	78%	0.136	0.149	0.36	59%	0.291	0.123	0.02
	Other non-Hispanic	200	81%	0.555	0.541	0.31	56%	0.058	0.167	0.73
Survey language, among Hispanics	Spanish	186	80%	0.159	0.252	0.53	61%	0.383	0.205	0.06
	English	199	80%	ref			56%	ref
Age	21–29	447	81%	-0.047	0.048	0.32	60%	-0.156	0.039	<0.0001
	30–44	694	80%				58%
	45–59	735	79%				53%
	60+	724	77%				47%
Household Income	<$30,000	616	73%	0.106	0.050	0.04	55%	-0.040	0.041	0.96
	$30,000–$59,999	657	78%				52%
	$60,000–$99,999	624	81%				52%
	$100,000+	704	85%				57%
Education	0–11 Years	297	69%	0.302	0.057	<0.0001	49%	0.230	0.047	<0.0001
	High School	773	74%				48%
	Some College	731	80%				55%
	B.A.	800	87%				60%
Residence in Metropolitan Statistical Area	Metro	2195	80%	ref			55%	ref
	Non-Metro	406	73%	-0.281	0.130	0.03	50%	-0.06	0.113	0.62
Lesbian, Gay, Bisexual or Transgender		203	82%	0.197	0.191	0.30	64%	0.390	0.155	0.01