Rehabilitation at Home Using Mobile Health In Older Adults After Hospitalization for Ischemic Heart Disease

Change in 6MWD, reflective of functional capacity, is measured by the 6-minute walk test (6MWT). The 6-minute walk test (6MWT) is a submaximal exercise test in which the pace is self-selected by the participant. The 6MWT will be performed during baseline hospitalization and at the 3-month follow-up visit by a blinded research nurse. The outcome change in 6MWD is calculated as 3 month 6MWD minus baseline 6MWD.

Weekly engagement will be measured as the fraction of the following 11 elements completed each week: (1-7) daily entry of exercise data and relative perceived exertion (RPE); (8) completed weekly phone call with exercise therapist; (9) at least one electronic communication with exercise therapist; (10) watching educational video (which will vary by week); and (11) at least one home BP measurement. Engagement will be assessed as a pseudo-continuous outcome, as the score can range from 0% (0 activities completed) to 100% (all 11 activities completed). The participants in the intervention arm will be grouped into 3 engagement phenotypes based on their scores: 1) Persistently Low, 2) Intermediate Declining, and 3) Persistently High.

Using the SMART goal framework, GAS describes the person's expected level of goal achievement over 3 months, ranging from no change (scored as -2) to much better than expected (scored as +2) out of a 5 point-scale. Scales are dynamically set according to a person's needs, while measurement of attainment is standardized. Overall score is calculated by incorporating the goal of outcomes scores into an aggregated t-score. Goal attainment, through goal setting, is an especially important outcome in older adults who may begin an intervention with a variety of deficits (therefore necessitating individualized therapy towards realistic goals).

The SF-12 is a self-reported outcome measure assessing the impact of health on an individual's everyday life. Scores range from 0 to 100, with higher scores indicating better physical and mental health functioning. For the SF-12, the 3 month score will be analyzed using a threshold of 5 points in SF-12 physical component score (PCS) as a clinically meaningful change.

The Seattle Angina Questionnaire-7 (SAQ-7) is a self-administered questionnaire that measures patient-reported health measures related to coronary artery disease (CAD). The SAQ-7 is scored from 0 to 100, with higher scores indicating better health status, less frequent angina, and better quality of life (0-24: Poor health status; 25-49: Fair; 50-74: Good; 75-100: Excellent). For SAQ-7, we will analyze at a single time point (3 months) the number of participants who have residual angina (SAQ-7<100) vs. no angina (SAQ-7=100).

Defined as any improvement or worsening in basic (BADLs) or instrumental (IADLs) over 3 months. The Bristol Activities of Daily Living Scale (BADL) measures basic self-care behaviors: feeding, toileting, bathing, dressing, and ambulating. The score is interpreted based on the total score, which ranges from 0 to 60. Higher scores indicate greater independence in daily living activities. The Lawton Instrumental Activities of Daily Living (IADL) scale measures activities that allow a person to live independently (e.g. food preparation, medication management, transportation, shopping, managing finances, using the telephone, and housekeeping). The total score ranges from 0 (low function, dependent) to 8 (high function, independent) for women, and 0 through 5 for men.

Defined as number of participants who were readmitted into the hospital with an overnight stay (including observation) in any hospital within 12 months of hospitalization. Data are obtainable via the electronic health record (EHR).

Data are obtainable via the electronic health record (EHR).