Table 2.

Willingness to participate in research among HealthStreet participants aged 50+, by race/ethnicity (n = 4694)

	Non-Hispanic White (n = 1970; 42.0%)	Non-Hispanic Black (n = 2479; 52.8%)	Hispanic (n = 245; 5.2%)	p value
Have you ever been in a health research study?A,C	565 (28.7%)	471 (19.0%)	47 (19.2%)	< 0.0001
Would you volunteer for a health research study:
That only asked questions about your health?C	1884 (95.6%)	2336 (94.2%)	233 (95.1%)	0.1072
If researchers wanted to see your medical records?C	1777 (90.2%)	2148 (86.7%)	222 (90.6%)	0.0006
If you had to give a blood sample?A,C	1834 (93.1%)	2148 (86.7%)	215 (87.8%)	< 0.0001
If you were asked to give a sample for genetic studies?A,C	1803 (91.5%)	2124 (85.7%)	211 (86.1%)	< 0.0001
If you might have to take medicine?A,B	1367 (69.4%)	1662 (67.0%)	138 (56.3%)	0.0002
If you were asked to stay overnight in a hospital or clinic?A,B	1580 (80.2%)	1978 (79.8%)	175 (71.4%)	0.0052
If you might have to use medical equipment?A,C	1789 (90.8%)	2149 (86.7%)	211 (86.1%)	< 0.0001
Would you participate in a study if you did not get paid?A,C	1666 (84.6%)	1921 (77.5%)	187 (76.3%)	< 0.0001
How interested are you being in a research study?B,C				< 0.0001
Definitely	1171 (59.4%)	1256 (50.7%)	148 (60.4%)
Maybe	690 (35.0%)	1039 (41.9%)	84 (34.3%)
Not at all	109 (5.5%)	184 (7.4%)	13 (5.3%)
How likely would you be to donate your brain for research?*B,C				< 0.0001
Likely	591 (30.0%)	285 (11.5%)	82 (33.5%)
Somewhat likely	250 (12.7%)	230 (9.3%)	39 (15.9%)
Not at all likely	265 (13.5%)	526 (21.2%)	51 (20.8%)
Did not respond	864 (43.8%)	1438 (58.0%)	73 (29.8%)

A: p < 0.05 between Hispanics and non-Hispanic Whites; B: p < 0.05 between Hispanics and non-Hispanic Blacks; C: p < 0.05 between non-Hispanic Whites and non-Hispanic Blacks; *This question was added in 2015. Of those who did not respond, 99% were interviewed before the question was added