Table 1.

First-degree relative perceived and practical barriers to participation in cancer prevention clinical trials subscale items and Cronbach's alphas

Information Sources Scale Items	α = .89
I would be interested in participating in a cancer prevention clinical trial that:
I heard about on the news
I learned about on the Internet.
A family member told me about.
My doctor told me about.
My relative's cancer doctor told me about.
Preferences for Prevention Approaches Scale Items	α = .92
I would be interested in participating in a cancer prevention clinical trial if:
I had to take vitamins or minerals.
I had to follow a specific diet or exercise program.
It involved complementary or alternative medicine approaches.
I had to take a prescribed medicine by mouth daily.
I had to take an injection in my arm for only three months.
I had to take an injection in my arm each week.
I had to take an injection in my arm each month for the rest of my life.
Psychosocial Factors Scale Items	α =.79
Learning about cancer prevention clinical trials would make me worry about getting cancer.
The thought of participating in clinical research makes me hopeful.
I feel hopeful when I think about how a cancer prevention trial might benefit me in particular.
I find it stressful to think about getting an experimental or investigational treatment.
I would be able to handle the requirements of taking part in a cancer prevention clinical trial.
I believe that participating in a cancer prevention clinical trial:
Would harm me.
Is important to find ways to prevent cancer.
Would benefit me.
Would benefit others.
I believe that:
I would get good care if I participated in a cancer prevention clinical trial.
Taking part in a cancer prevention clinical trial would decrease my risk of getting cancer.
I would get a placebo (sugar pill) if I participated in a clinical trial.
I would be likely to experience side effects if I took part in a cancer prevention clinical trial.

Abbreviations: α = Cronbach's alpha