Table 1.

Sample Questions for Adapted Health Belief Model Constructs

Adapted Health Belief Model construct	Sample questions/scale
Impact of illness on decision to participate in a research study	In general, how would you describe your health? Scale: Excellent=0, Good=1, Fair=2, Poor=3
Benefits of research; benefits of participating in research	Doctors and nurses will pay more attention to you if you are in a research study.
	You can get new medications for your HIV if you are in a research study.
	Scale: Strongly disagree=1; Strongly agree=5
Barriers to participating; inconveniences, burdens of participating in research	How worried are you …… that you will be treated like a “guinea pig” in a research study?
	… that a research study will interfere with your current HIV treatment?
	Scale: Not at all worried=1; Worried a lot=5
“Triggers” to participating in a study	In deciding to be in a research study, how important …
	… is your doctor's opinion?
	… is the amount of money you get paid for being in the research?
	Scale: Not at all important=1; Very important=5
Self-efficacy: Degree of certainty that one can perform activities associated with participating in research	You can get to all the appointments for a research study.
	You can tell your doctor if you want to stop being in a research study.
	Scale: Cannot do at all=1; Completely certain I can do=5