Myocardial Infarction, COmbined-device, Recovery Enhancement Study

We estimated typical costs associated with readmissions or death of acute myocardial infarction (AMI) patients discharged with standard practices using 2014 US hospital costs from the Agency for Healthcare Research and Quality (AHRQ). The hospital cost (in US dollars) for unplanned 30-day readmission is presented for the Corrie Digital Health Platform Group and the Historical Comparison Group. The reported number is the estimated cost per readmission per participant since the exact cost of the readmission for each patient who was readmitted within 30-days wasn't available. No measure of central tendency is available.

Among participants in the Corrie Digital Health group, a nine-item five-point Likert scale for assessing in-hospital care satisfaction 3 days post-discharge is used with scoring from 1 "strongly disagree" to 5 "strongly agree", with higher scores meaning participants were more satisfied with the care received. A total score of these nine items is calculated with possible total scores ranging from 9 to 45.

Among participants in the Corrie Digital Health group, a nine-item five-point Likert scale for assessing in-hospital care satisfaction 3 days post-discharge is used with scoring from 1 "strongly disagree" to 5 "strongly agree", with higher scores meaning participants were more satisfied with the care received. A total score of these nine items is calculated with possible total scores ranging from 9 to 45.

Among participants in the Corrie Digital Health group, one additional item, not on the five-point Likert scale, for assessing in-hospital care satisfaction 3 days post-discharge asked if they received information in writing about what symptoms or health problems to look out for after leaving the hospital (Yes/No).

Among participants in the Corrie Digital Health group, one additional item, not on the five-point Likert scale, for assessing in-hospital care satisfaction 3 days post-discharge asked them to provide an overall hospital rating on a 1-10 sliding scale with a higher score indicating a higher overall hospital rating.

Among participants in the Corrie Digital Health group, a 10-item five-point Likert scale for assessing systems usability of Corrie both 3 and 30 days post-discharge is used with scoring from 0 to 4 and higher scores meaning patients perceive the system as having global usability. The total score reference range is from 0 to 100, where lower scores indicate lower perceived application usability.

Among participants in the Corrie Digital Health group, a five-item five-point Likert scale for assessing participant satisfaction with Corrie as a tool to improve acute myocardial infarction recovery 3 and 30 days post-discharge is used with scoring from 1 to 5 and higher scores meaning more satisfaction with Corrie. Total possible scores ranging from 5 to 25, where higher scores indicate greater Corrie app satisfaction.

Among participants in the Corrie Digital Health group, a 29-item five-point Likert scale for assessing the subjective experience of user engagement with Corrie 30 days post discharge is used with scoring ranging from 1 to 5 and higher scores reflecting higher perceived user engagement. The total subjective user engagement score was calculated by diving the sum of all items by 29, resulting in a range of potential total scores from 1 to 5.

The total number of app interactions is a behavioral manifestation of user engagement and is monitored through app usage data. The total number of app interactions consisted of: number of BP, heart rate,weight, mood, and step count recordings; number of medications tracked; and number of educational articles and videos viewed over the study period.

The overall amount of time (days) spent using the app is a behavioral manifestation of user engagement and is monitored through app usage data and collected via Corrie Health Platform app user analytics.

Among participants in the Corrie Digital Health group, the 10-item five-point Likert scale for assessing patient activation 3 and 30 days post-discharge is used with scoring ranging from 1 to 5 and higher scores indicating the patient possesses the necessary knowledge, skills, and confidence needed for self-care. The total score reference range is from 0 to 100, where lower scores indicate lower patient activation.

Among participants in the Corrie Digital Health group, the eight-item four-point Likert scale for assessing cardiac medication adherence 30 days post-discharge is used with scoring ranging from 1 to 4 and lower scores indicating better adherence. Total possible scores could range from 8 to 32 with lower scores indicating better adherence. The total cardiac medication adherence score was dichotomized into completely cardiac medication adherent and near completely cardiac medication adherent, based on the median score.

Cardiac medication adherence (beta-blockers, anti-platelets, statins) is measured from the smartphone app usage data as the percentage of cardiac medications marked as "taken".

Medication adherence is measured from the smartwatch app usage data as percent of pills marked as taken.

Number of participants who had Emergency department visits (at Johns Hopkins Hospital and Johns Hopkins Bayview Medical Center) within 30-days post hospital discharge, that did not result in readmission, in the Corrie Digital Health Group as compared to the Historical Standard of Care Comparison group, collected from hospital administrative databases.

Number of hospital observations within 30-days post hospital discharge in the Corrie Digital Health Group as compared to the Historical Standard of Care Comparison group, collected from hospital administrative databases.

Among participants in the Corrie Digital Health group, the investigators are querying participants in the surveys sent out 30 days post-discharge as to whether participants attended an appointment with a primary care provider, cardiologist, and/or cardiac rehab. A point is given to each appointment attended with scores raging from 0 to 3.

Number of readmitted participants who had Recurrent myocardial infarctions in the Corrie Digital Health Group. Participants who had an all-cause 30-day readmission in the Corrie group, as identified by hospital administrative datasets, underwent further chart review to determine if the cause of readmission was a recurrent myocardial infarction.

Death within 30-days post hospital discharge in the Corrie Digital Health Group as compared to the Historical Standard of Care Comparison group, collected from hospital administrative databases.