Selected questionnaire items used to define predictor variables/risk factors

Low Health Literacy Scale26 Each original item was scored from 0-4, with higher scores indicating lower health literacy. We created a scale assigning 1 point for each response greater than 0.
How often do you have someone like a family member, friend, hospital or clinic worker or caregiver, help you read health-related materials?
How often do you have problems learning about your medical condition because of difficulty understanding written information?
How confident are you filling out medical forms by yourself?
In the last 12 months, how often did doctors or other health care providers explain things in a way you could understand?
Low Self-efficacy for Cardiovascular Risk Reduction (defined as a response of “high” or “very high” to item #1 but a response of “not at all” or “a little” to item #2)
Item #1: Acknowledgement of risk: “What do you think your risk is of having a heart attack in the next 10 years?”
Item #2: Belief of ability to lower risk: “How much do you think that you or your doctor can lower your risk or chance of a heart attack?”
Ran Out of Medication (1 item)
In the past 6 months, did you ever run out of any medicines that were prescribed by your doctor or another health provider?
Missed Medication Doses (1 item)
In the past 6 months, did you ever miss a dose of any of your medicines, even just one pill or shot?
Provider Communication Scales24 Each original item was scored from 1-5, with higher scores indicating better provider communication as perceived by respondents. We created a summary scale with scores ranging from 2-10 (except eliciting patient concerns which ranges from 3-15).		Cronbach’s α
General Clarity (2 items, reverse coded)	How often did doctors speak too fast?	0.59
	How often did doctors use words that were hard to understand?
Eliciting Patient Concerns (3 items)	How often did doctors find out what your concerns really were?	0.73
	How often did doctors let you say what you thought was important?
	How often did doctors take your health concerns very seriously?
Discussing Patient Preferences (2 items)	How often did you and your doctors work out a treatment plan together?	0.76
	If there were treatment choices, how often did doctors ask if you would like to help decide your treatment?
Discussing Barriers to Medication Adherence (2 items)	How often did doctors ask if you would have any problems following what they recommended?	0.81
	How often did doctors ask you if you felt you could do the recommended treatment?