Table 1

Study outcomes

Outcome	Description	Assessment
Outcome	Description	T0	T1	T2
Primary
Provider enrolment (feasibility)	The proportion of eligible cardiology providers (APs and nurses) who agreed to take part in the research.	X
Patient enrolment (feasibility)	The proportion of eligible cardiology inpatients who agreed to take part in the research.	X
Intervention fidelity (feasibility)	The proportion of cardiology inpatients in the intervention arm that received the audio-recording intervention with full adherence to a predefined protocol fidelity checklist.		X
Patient use of intervention (acceptability)	The proportion of discharged cardiology patients in the intervention arm who used the audio recording between the day of discharge and a 1-week follow-up telephone call initiated by the research team.			X
Exploratory
Change in patient activation	The PAM-13 is a 13-item survey that assesses a person's underlying knowledge, skills and confidence integral to managing his or her own health and healthcare.	X	X	X
Change in health confidence	The proportion of patients who report high confidence measured using an adapted version of the Health Confidence Measure with three response options: ‘very confident’, ‘somewhat confident’ and ‘not confident’.	X	X	X
Change in patient ability to understand health information	The proportion of patients who report a high ability to understand health information measured using an adapted version of the Health Confidence Measure with three response options: ‘very understandable’, ‘somewhat understandable’ and ‘not understandable’.	X	X	X
Change in patient general medical adherence	Measured using the MOS measure of adherence. The five-item MOS measures general adherence to medical advice on a 6-point rating scale ranging from 1 (none of the time) to 6 (all of the time).	X		X
Patient assessment of discharging provider communication ability	Measured using the CAT. The 15-item CAT measures patient perceptions of physician performance in the area of interpersonal and communication skills using a 5-point rating scale ranging from 1 (poor) to 5 (excellent).		X
Patient adherence to medications	Measured using the ARMS-7. ARMS-7 measures medication adherence and refill behaviours on a 4-point rating scale ranging from 1 (none of the time) to 4 (all of the time).			X
Use of paper discharge instructions	The number of patients who use (read) their paper discharge instructions between the time of discharge and the research team’s postdischarge follow-up telephone interview.			X
Rate of patient-generated postdischarge telephone calls	The number of patient-generated postdischarge phone calls to the outpatient cardiology clinic or hospital emergency telephone line between the time of discharge and the research team's postdischarge follow-up telephone interview.			X
Content of patient-generated postdischarge telephone calls	DHMC data analytics will provide a list of all phone calls initiated by enrolled discharged patients to the outpatient cardiology clinic or hospital emergency telephone line between the day of their discharge and approximately 1 week after discharge. PI SS will review telephone data to categorise and quantify reasons for calling.			X
30-day readmission rates	DHMC data analytics will provide a list of enrolled patients who were readmitted to the hospital between their date of discharge and 30 days after discharge. PI SS will review readmission data and will compare rates between study arms to aggregate data for the cardiology inpatient unit during the study period.	30 days after hospital discharge

AP, associate provider; ARMS-7, Seven-Item Adherence to Refills and Medications Scale; CAT, Communication Assessment Tool; DHMC, Dartmouth Hitchcock Medical Centre; MOS, Medical Outcomes Study; PAM-13, 13-Item Patient Actitvation Measure; PI, primary investigator; T0, day of discharge, before randomisation; T1, postrandomisation, day of discharge, immediately following inpatient discharge discussion; T2, postrandomisation, 1 week after inpatient discharge by telephone.