Results of multiple logistic regressions examining demographic and attitudinal differences in preferences to donate biosample.

Demographic items were excluded from this table if none was statistically significant. Except age, all variables were entered into the models as categorical variables. CI: Confidence Interval. RE: Reference. *: Concern 1–9: 1: more tissue would be taken for research than was needed. 2: my confidentiality would be lost. 3: donations might be used in research that is dangerous to me or others. 4: donation might spread my disease. 5: donation might cause potential ethical issues. 6: I do not trust the intent of medical institutions. 7: I haven't thought about donation. 8: it's bad for my health. 9: no concern.