Cardiac Rehabilitation
Conditions
Keywords
Incentives, Case management, Socioeconomic status
Brief summary
Participation in outpatient cardiac rehabilitation (CR) decreases morbidity and mortality for patients hospitalized with myocardial infarction, coronary bypass surgery or percutaneous revascularization. Unfortunately, only 10-35% of patients for whom CR is indicated choose to participate. Lower socioeconomic status (SES) is a robust predictor of CR non-participation. There is growing recognition of the need to increase CR among economically disadvantaged patients, but there are almost no evidence-based interventions available for doing so. The present study will examine the efficacy of using early case management and financial incentives for increasing CR participation among lower-SES patients. Case management has been effective at promoting attendance at a variety of health-related programs (e.g. treatment for diabetes, HIV, asthma, cocaine dependence) as well as reducing hospitalizations. Financial incentives are also highly effective in altering health behaviors among disadvantaged populations (e.g., smoking during pregnancy, weight loss) including CR participation in a prior trial. For this study 209 CR-eligible lower-SES patients will be randomized to: a treatment condition where patients are assigned a case manager while in hospital who will facilitate CR attendance and coordinate cardiac care, a treatment condition where patients receive financial incentives contingent on initiation of and continued attendance at CR sessions, a combination of these two interventions, or to a usual-care condition. Participants in all conditions will complete pre- and post-treatment assessments. Treatment conditions will be compared on attendance at CR and end-of-intervention improvements in fitness, executive function, and health-related quality of life. Cost effectiveness of the treatment conditions will also be examined by comparing the costs of delivering the interventions and the usual care condition, taking into account increases in CR participation. Furthermore, the value of the interventions will be modeled based on increases in participation rates, intervention costs, long-term medical costs, and health outcomes after a coronary event. This systematic examination of promising interventions will allow testing of the efficacy and cost-effectiveness of approaches that have the potential to substantially increase CR participation and significantly improve health outcomes among lower-SES cardiac patients.
Interventions
Patient earns financial incentives (gift cards) on an escalating schedule for completing cardiac rehabilitation sessions.
A case manager is available by phone to assist patient with attending cardiac rehabilitation sessions as well as to provide advice about cardiac symptoms and healthy behavior change.
Sponsors
Study design
Eligibility
Inclusion criteria
* A recent myocardial infarction, coronary revascularization, diagnosis of congestive heart failure (CHF) or heart valve replacement or repair * Enrolled in a state-supported insurance plan for low income individuals or receiving other state benefits that are based on financial need (housing subsidy, food stamps, etc.), or with a less than high school education. * Lives in and plans to remain in the greater Burlington, Vermont area (Chittenden county) for the next 12 mos. * Copley Hospital (Morrisville, VT) transfer patient (enrolled in a state-supported insurance plan for low income individuals or receiving other state benefits that are based on financial need) * Northwestern Medical Center (St Albans, VT) transfer patient (enrolled in a state-supported insurance plan for low income individuals or receiving other state benefits that are based on financial need)
Exclusion criteria
* Dementia (MMSE\<20) or current untreated Axis 1 psychiatric disorder other than nicotine dependence as determined by medical history * Advanced cancer, advanced frailty, or other longevity-limiting systemic disease that would preclude CR participation * Rest angina or very low threshold angina (\<2 METS) until adequate therapy is instituted * Severe life threatening ventricular arrhythmias unless adequately controlled (e.g. intracardiac defibrillator) * Class 4 chronic heart failure (symptoms at rest) * Exercise-limiting non-cardiac disease such as severe arthritis, past stroke, severe lung disease * Previous successful attendance at cardiac rehabilitation (defined as completing 6+ sessions in the past 10 years)
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Cardiac Rehabilitation Attendance | Within 4 months of the intake assessment | Number of cardiac rehabilitation sessions completed out of a possible 36 |
| Cardiac Rehabilitation Completion | Within 4 months of the intake assessment | Proportion of patients who complete 30+ sessions of cardiac rehabilitation |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Change in Fitness (Estimated Metabolic Equivalent of Task) | Within 4 months of the intake assessment | Changes in fitness level (Metabolic Equivalent of Tasks) will be measured from intake to completion of the intervention (4 months after intake). |
| Change in Fitness (Peak Oxygen Uptake) | Within 4 months of the intake assessment | Changes in fitness level (peak oxygen uptake) will be measured from intake to completion of the intervention (4 months after intake). |
| Change in Body Composition | Within 4 months of the intake assessment | Changes in waist measurement will be measured from intake to completion of the intervention (4 months after intake). |
| Changes in Smoking Status | Within 4 months of the intake assessment | Changes in smoking status will be measured from intake to completion of the intervention (4 months after intake). |
| Changes in Quality of Life - Cardiac Specific | Within 4 months of the intake assessment | Changes in perceived quality of life (MacNew) questionnaires will be measured from intake to completion of the intervention (4 months after intake). The MacNew Heart Disease Health-Related Quality of Life Questionnaire was used. Scores range from 1 to 7, with higher scores indicating better outcomes. |
| Changes in Quality of Life - Non-specific | Within 4 months of the intake assessment | Changes in perceived quality of life (EuroQoL) questionnaires will be measured from intake to completion of the intervention (4 months after intake). The Visual Analogue Scale of the EuroQol-5D-3L was used. Scores range from 0 to 100, with higher scores indicating better outcomes. |
| Changes in Mental Health | Within 4 months of the intake assessment | Changes in mental health (Adult Self-Report) questionnaires will be measured from intake to completion of the intervention (4 months after intake) using the Achenbach System of Empirically Based Assessment (ASEBA). T-scores are reported. A T-score of 50 indicates the population mean, and 10 is the standard deviation. Higher T-scores indicate worse outcomes. T-scores above 63 indicate clinically significant problems, and those between 60 and 63 fall within the borderline clinical range. |
| Changes in Depressive Symptoms | Within 4 months of the intake assessment | Changes in reported depressive symptoms The Beck Depression Inventory (BDI) will be measured from intake to completion of the intervention (4 months after intake). BDI results will be back transformed due to data being square root transformed. Scores range from 0 to 63, with higher scores indicating worse outcomes. |
| Changes in Executive Function (Delay Discounting) | Within 4 months of the intake assessment | Changes in Executive function (delay discounting) will be measured from intake to completion of the intervention (4 months after intake). A 5-trial adjusting delay discounting task was used to calculate k values, numerical representations of the rate of discounting. k values range from 0 to 0.5, with larger values indicating steeper discounting (more impulsivity; greater propensity to devalue delayed rewards in favor of more immediate outcomes). k values were log(10) transformed for analysis. Larger log transformed k values indicate steeper discounting. |
| Changes in Executive Function (DS) | Within 4 months of the intake assessment | Changes in Executive function (digit span) will be measured from intake to completion of the intervention (4 months after intake). The Digit Span subtest of the Wechsler Adult Intelligence Scale-IV (WAIS-IV) was used. Scores range from 1 to 19, with higher scores indicating worse outcomes. |
| Changes in Executive Function (Trail) | Within 4 months of the intake assessment | Changes in Executive function (Trail making task) will be measured from intake to completion of the intervention (4 months after intake). The Trail-Making subtest of the Delis-Kaplan Executive Function System (D-KEFS) was used. Scores range from 1 to 19, with higher scores indicating worse outcomes. |
| Changes in Executive Function (BRIEF) | Within 4 months of the intake assessment | Changes in self-reported Executive function problems (BRIEF) will be measured from intake to completion of the intervention (4 months after intake). The Global Executive Composite (GEC) of the Behavior Rating Inventory of Executive Function (BRIEF) was used. T-scores are reported. A T-score of 50 indicates the population mean, and 10 is the standard deviation. Higher T-scores indicate worse outcomes. T-scores above 65 indicate clinically significant problems. |
| Changes in Executive Function (SST) | Within 4 months of the intake assessment | Changes in Executive function (Stop Signal Task) will be measured from intake to completion of the intervention (4 months after intake). |
| Health Care Contacts | One year period starting at intake assessment. | Combined measure of number of Emergency Department (ED) visits and overnight hospitalizations. |
| Health Care Costs | One year period starting at intake assessment. | Costs associated with combined Emergency Department (ED) visits and overnight hospitalizations. |
Other
| Measure | Time frame | Description |
|---|---|---|
| Maintenance of Smoking Status Following Intervention. | From completion of intervention (4 months) to follow-up (one-year). | Changes in smoking status will be measured from intervention completion until follow-up (8 months after intervention completion). |
| Maintenance of Quality of Life (Cardiac-specific) Following Intervention. | From completion of intervention (4 months) to follow-up (one-year). | Changes in perceived quality of life (MacNew) questionnaires will be measured from intervention completion until follow-up (8 months after intervention completion). The MacNew Heart Disease Health-Related Quality of Life Questionnaire was used. Scores range from 1 to 7, with higher scores indicating better outcomes. |
| Maintenance of Quality of Life (Noncardiac-specific) Following Intervention. | From completion of intervention (4 months) to follow-up (one-year). | Changes in perceived quality of life (EuroQoL) questionnaires will be measured from intervention completion until follow-up (8 months after intervention completion). The Visual Analogue Scale of the EuroQol-5D-3L was used. Scores range from 0 to 100, with higher scores indicating better outcomes. |
| Maintenance of Mental Health Following Intervention. | From completion of intervention (4 months) to follow-up (one-year). | Changes in mental health (Adult Self-Report) questionnaires will be measured from intervention completion until follow-up (8 months after intervention completion) using the Achenbach System of Empirically Based Assessment (ASEBA). T-scores are reported. A T-score of 50 indicates the population mean, and 10 is the standard deviation. Higher T-scores indicate worse outcomes. T-scores above 63 indicate clinically significant problems, and those between 60 and 63 fall within the borderline clinical range. |
| Maintenance of Depressive Symptoms Following Intervention. | From completion of intervention (4 months) to follow-up (one-year). | Changes in reported depressive symptoms The Beck Depression Inventory (BDI) will be measured from intervention completion until follow-up (8 months after intervention completion). BDI results will be back transformed due to data being square root transformed. Scores range from 0 to 63, with higher scores indicating worse outcomes. |
| Maintenance of Executive Function (Delay Discounting) Following Intervention. | From completion of intervention (4 months) to follow-up (one-year). | Changes in Executive function (delay discounting) will be measured from intervention completion until follow-up (8 months after intervention completion). A 5-trial adjusting delay discounting task will be used to calculate k values, numerical representations of the rate of discounting. k values range from 0 to 0.5, with larger values indicating steeper discounting (more impulsivity; greater propensity to devalue delayed rewards in favor of more immediate outcomes). k values were log(10) transformed for analysis. Larger log transformed k values indicate steeper discounting. |
| Maintenance of Executive Function (DS) Following Intervention. | From completion of intervention (4 months) to follow-up (one-year). | Changes in Executive function (digit span) will be measured from intervention completion until follow-up (8 months after intervention completion). The Digit Span subtest of the Wechsler Adult Intelligence Scale-IV (WAIS-IV) was used. Scores range from 1 to 19, with higher scores indicating worse outcomes. |
| Maintenance of Executive Function (BRIEF) Following Intervention. | From completion of intervention (4 months) to follow-up (one-year). | Changes in self-reported Executive function problems (BRIEF) will be measured from intervention completion until follow-up (8 months after intervention completion). The Global Executive Composite (GEC) of the Behavior Rating Inventory of Executive Function (BRIEF) was used. T-scores are reported. A T-score of 50 indicates the population mean, and 10 is the standard deviation. Higher T-scores indicate worse outcomes. T-scores above 65 indicate clinically significant problems. |
| Maintenance of Executive Function (SST) Following Intervention. | From completion of intervention (4 months) to follow-up (one-year). | Changes in Executive function (stop signal task) will be measured from intervention completion until follow-up (8 months after intervention completion). |
| Maintenance of Executive Function (Trail) Following Intervention. | From completion of intervention (4 months) to follow-up (one-year). | Changes in Executive function (trail making task) will be measured from intervention completion until follow-up (8 months after intervention completion). The Trail-Making subtest of the Delis-Kaplan Executive Function System (D-KEFS) was used. Scores range from 1 to 19, with higher scores indicating worse outcomes. |
| Cost-effectiveness | One year period starting at intake assessment. | Cost-effectiveness of the intervention will be determined. Cost-effectiveness is a single outcome (cost per per quality-adjusted life year gained) that is calculated by integrating the cost of delivering the intervention, the cost to the patient of receiving the intervention, and the benefits both in quality of life and in reductions in healthcare utilization. |
| Maintenance of Waist Circumference Following Intervention. | From completion of intervention (4 months) to follow-up (one-year). | Changes in waist circumference will be measured from intervention completion until follow-up (8 months after intervention completion). |
| Maintenance of Fitness Following Intervention (Peak Oxygen Uptake) | From completion of intervention (4 months) to follow-up (one-year). | Changes in fitness level (peak oxygen uptake) will be measured from intervention completion until follow-up (8 months after intervention completion). |
| Maintenance of Fitness Following Intervention (Estimated Metabolic Equivalent of Task) | From completion of intervention (4 months) to follow-up (one-year). | Changes in fitness level (Estimated Metabolic Equivalent of Task) will be measured from intervention completion until follow-up (8 months after intervention completion). |
Countries
United States
Participant flow
Participants by arm
| Arm | Count |
|---|---|
| Incentives Patient earns incentives for completing cardiac rehabilitation sessions.
Incentives: Patient earns financial incentives (gift cards) on an escalating schedule for completing cardiac rehabilitation sessions. | 53 |
| Case Management Patient is assigned a case manager while in hospital.
Case Management: A case manager is available by phone to assist patient with attending cardiac rehabilitation sessions as well as to provide advice about cardiac symptoms and healthy behavior change. | 51 |
| Incentives and Case Management Patient receives both the Incentives and Case Management interventions.
Incentives: Patient earns financial incentives (gift cards) on an escalating schedule for completing cardiac rehabilitation sessions.
Case Management: A case manager is available by phone to assist patient with attending cardiac rehabilitation sessions as well as to provide advice about cardiac symptoms and healthy behavior change. | 52 |
| Usual Care This control condition does not receive either intervention. | 36 |
| Total | 192 |
Withdrawals & dropouts
| Period | Reason | FG000 | FG001 | FG002 | FG003 |
|---|---|---|---|---|---|
| Overall Study | Moved outside eligible area | 0 | 2 | 0 | 0 |
| Overall Study | Not appropriate for cardiac rehab | 4 | 4 | 4 | 2 |
| Overall Study | Withdrawal by Subject | 0 | 0 | 1 | 0 |
Baseline characteristics
| Characteristic | Case Management | Incentives and Case Management | Total | Incentives | Usual Care |
|---|---|---|---|---|---|
| Age, Categorical <=18 years | 0 Participants | 0 Participants | 0 Participants | 0 Participants | 0 Participants |
| Age, Categorical >=65 years | 12 Participants | 10 Participants | 45 Participants | 14 Participants | 9 Participants |
| Age, Categorical Between 18 and 65 years | 39 Participants | 42 Participants | 147 Participants | 39 Participants | 27 Participants |
| Age, Continuous | 57.9 years STANDARD_DEVIATION 12.7 | 57.9 years STANDARD_DEVIATION 10.9 | 57.7 years STANDARD_DEVIATION 11.3 | 57.6 years STANDARD_DEVIATION 11.2 | 57.1 years STANDARD_DEVIATION 10.5 |
| Beck Depression Inventory | 14.6 units on a scale STANDARD_DEVIATION 10.4 | 11.1 units on a scale STANDARD_DEVIATION 8.2 | 12.6 units on a scale STANDARD_DEVIATION 10 | 9.3 units on a scale STANDARD_DEVIATION 7.5 | 17.5 units on a scale STANDARD_DEVIATION 13.7 |
| Currently Smoking | 21 Participants | 23 Participants | 85 Participants | 23 Participants | 18 Participants |
| Education College/Advanced Degree | 10 Participants | 16 Participants | 49 Participants | 13 Participants | 10 Participants |
| Education Data Missing | 0 Participants | 0 Participants | 1 Participants | 1 Participants | 0 Participants |
| Education High School/Some College | 22 Participants | 28 Participants | 93 Participants | 28 Participants | 15 Participants |
| Education Less Than High School/GED | 19 Participants | 8 Participants | 49 Participants | 11 Participants | 11 Participants |
| Enrolled in Medicaid | 48 Participants | 50 Participants | 185 Participants | 52 Participants | 35 Participants |
| Estimated Metabolic Equivalent of Task (METs) | 5.5 kilocalories per kilogram per hour STANDARD_DEVIATION 2.3 | 6.2 kilocalories per kilogram per hour STANDARD_DEVIATION 2.2 | 5.9 kilocalories per kilogram per hour STANDARD_DEVIATION 2.5 | 5.8 kilocalories per kilogram per hour STANDARD_DEVIATION 2.7 | 6.4 kilocalories per kilogram per hour STANDARD_DEVIATION 3 |
| EuroQol Visual Analogue Scale | 55.2 units on a scale STANDARD_DEVIATION 22.4 | 60.1 units on a scale STANDARD_DEVIATION 19.3 | 60.2 units on a scale STANDARD_DEVIATION 19.9 | 64.1 units on a scale STANDARD_DEVIATION 16.4 | 62.4 units on a scale STANDARD_DEVIATION 20.9 |
| MacNew Heart Disease Health-related Quality of Life Questionnaire | 4.9 units on a scale STANDARD_DEVIATION 1.1 | 5.1 units on a scale STANDARD_DEVIATION 1 | 4.9 units on a scale STANDARD_DEVIATION 1.1 | 5.0 units on a scale STANDARD_DEVIATION 1 | 4.7 units on a scale STANDARD_DEVIATION 1.3 |
| Patient Health Questionnaire-2 Data Missing | 0 Participants | 1 Participants | 2 Participants | 1 Participants | 0 Participants |
| Patient Health Questionnaire-2 Screen Negative (0-2) | 41 Participants | 40 Participants | 145 Participants | 39 Participants | 25 Participants |
| Patient Health Questionnaire-2 Screen Positive (0-2) | 10 Participants | 11 Participants | 45 Participants | 13 Participants | 11 Participants |
| Peak Oxygen Uptake (Peak VO2) | 16.8 milliliters per kilogram per minute STANDARD_DEVIATION 5.5 | 18.8 milliliters per kilogram per minute STANDARD_DEVIATION 5.5 | 17.9 milliliters per kilogram per minute STANDARD_DEVIATION 5.9 | 17.9 milliliters per kilogram per minute STANDARD_DEVIATION 6.3 | 17.7 milliliters per kilogram per minute STANDARD_DEVIATION 6.7 |
| Primary Diagnosis Chronic Systolic Heart Failure | 6 Participants | 4 Participants | 21 Participants | 6 Participants | 5 Participants |
| Primary Diagnosis Coronary Artery Bypass Graft | 7 Participants | 6 Participants | 29 Participants | 12 Participants | 4 Participants |
| Primary Diagnosis Myocardial Infarction | 1 Participants | 5 Participants | 9 Participants | 1 Participants | 2 Participants |
| Primary Diagnosis Percutaneous Intervention | 27 Participants | 31 Participants | 108 Participants | 27 Participants | 23 Participants |
| Primary Diagnosis Stable Angina | 2 Participants | 1 Participants | 3 Participants | 0 Participants | 0 Participants |
| Primary Diagnosis Valve Replacement/Repair | 8 Participants | 5 Participants | 22 Participants | 7 Participants | 2 Participants |
| Race/Ethnicity, Customized American Indian | 1 participants | 1 participants | 5 participants | 2 participants | 1 participants |
| Race/Ethnicity, Customized Asian | 0 participants | 0 participants | 3 participants | 1 participants | 2 participants |
| Race/Ethnicity, Customized Black or African American | 4 participants | 1 participants | 9 participants | 3 participants | 1 participants |
| Race/Ethnicity, Customized Hispanic Other/Multiracial | 0 participants | 0 participants | 1 participants | 1 participants | 0 participants |
| Race/Ethnicity, Customized Hispanic White | 3 participants | 0 participants | 3 participants | 0 participants | 0 participants |
| Race/Ethnicity, Customized Non-Hispanic White | 41 participants | 48 participants | 162 participants | 44 participants | 29 participants |
| Race/Ethnicity, Customized Other/Multiracial | 2 participants | 2 participants | 9 participants | 2 participants | 3 participants |
| Region Rural | 14 Participants | 15 Participants | 48 Participants | 16 Participants | 3 Participants |
| Region Urban | 37 Participants | 37 Participants | 144 Participants | 37 Participants | 33 Participants |
| Region of Enrollment United States | 51 participants | 52 participants | 192 participants | 53 participants | 36 participants |
| Sex: Female, Male Female | 21 Participants | 20 Participants | 67 Participants | 12 Participants | 14 Participants |
| Sex: Female, Male Male | 30 Participants | 32 Participants | 125 Participants | 41 Participants | 22 Participants |
| Waist Circumference | 44.6 inches STANDARD_DEVIATION 8.7 | 43.0 inches STANDARD_DEVIATION 6.8 | 42.8 inches STANDARD_DEVIATION 7.2 | 41.3 inches STANDARD_DEVIATION 6.4 | 42.2 inches STANDARD_DEVIATION 6.3 |
Adverse events
| Event type | EG000 affected / at risk | EG001 affected / at risk | EG002 affected / at risk | EG003 affected / at risk |
|---|---|---|---|---|
| deaths Total, all-cause mortality | 3 / 53 | 5 / 51 | 3 / 52 | 0 / 36 |
| other Total, other adverse events | 39 / 53 | 42 / 51 | 42 / 52 | 27 / 36 |
| serious Total, serious adverse events | 15 / 53 | 25 / 51 | 20 / 52 | 16 / 36 |
Outcome results
Cardiac Rehabilitation Attendance
Number of cardiac rehabilitation sessions completed out of a possible 36
Time frame: Within 4 months of the intake assessment
| Arm | Measure | Value (LEAST_SQUARES_MEAN) |
|---|---|---|
| Incentives | Cardiac Rehabilitation Attendance | 16.9 sessions of CR |
| Case Management | Cardiac Rehabilitation Attendance | 12.0 sessions of CR |
| Incentives and Case Management | Cardiac Rehabilitation Attendance | 24.1 sessions of CR |
| Usual Care | Cardiac Rehabilitation Attendance | 10.9 sessions of CR |
Cardiac Rehabilitation Completion
Proportion of patients who complete 30+ sessions of cardiac rehabilitation
Time frame: Within 4 months of the intake assessment
| Arm | Measure | Value (COUNT_OF_PARTICIPANTS) |
|---|---|---|
| Incentives | Cardiac Rehabilitation Completion | 22 Participants |
| Case Management | Cardiac Rehabilitation Completion | 13 Participants |
| Incentives and Case Management | Cardiac Rehabilitation Completion | 32 Participants |
| Usual Care | Cardiac Rehabilitation Completion | 4 Participants |
Change in Body Composition
Changes in waist measurement will be measured from intake to completion of the intervention (4 months after intake).
Time frame: Within 4 months of the intake assessment
| Arm | Measure | Value (LEAST_SQUARES_MEAN) |
|---|---|---|
| Incentives | Change in Body Composition | 42.1 inches |
| Case Management | Change in Body Composition | 42.7 inches |
| Incentives and Case Management | Change in Body Composition | 42.1 inches |
| Usual Care | Change in Body Composition | 42.0 inches |
Change in Fitness (Estimated Metabolic Equivalent of Task)
Changes in fitness level (Metabolic Equivalent of Tasks) will be measured from intake to completion of the intervention (4 months after intake).
Time frame: Within 4 months of the intake assessment
| Arm | Measure | Value (LEAST_SQUARES_MEAN) |
|---|---|---|
| Incentives | Change in Fitness (Estimated Metabolic Equivalent of Task) | 7.4 milliliters per kilogram per minute |
| Case Management | Change in Fitness (Estimated Metabolic Equivalent of Task) | 6.5 milliliters per kilogram per minute |
| Incentives and Case Management | Change in Fitness (Estimated Metabolic Equivalent of Task) | 7.0 milliliters per kilogram per minute |
| Usual Care | Change in Fitness (Estimated Metabolic Equivalent of Task) | 6.7 milliliters per kilogram per minute |
Change in Fitness (Peak Oxygen Uptake)
Changes in fitness level (peak oxygen uptake) will be measured from intake to completion of the intervention (4 months after intake).
Time frame: Within 4 months of the intake assessment
| Arm | Measure | Value (LEAST_SQUARES_MEAN) |
|---|---|---|
| Incentives | Change in Fitness (Peak Oxygen Uptake) | 20.9 milliliters per kilogram per minute |
| Case Management | Change in Fitness (Peak Oxygen Uptake) | 18.3 milliliters per kilogram per minute |
| Incentives and Case Management | Change in Fitness (Peak Oxygen Uptake) | 18.6 milliliters per kilogram per minute |
| Usual Care | Change in Fitness (Peak Oxygen Uptake) | 21.2 milliliters per kilogram per minute |
Changes in Depressive Symptoms
Changes in reported depressive symptoms The Beck Depression Inventory (BDI) will be measured from intake to completion of the intervention (4 months after intake). BDI results will be back transformed due to data being square root transformed. Scores range from 0 to 63, with higher scores indicating worse outcomes.
Time frame: Within 4 months of the intake assessment
| Arm | Measure | Value (LEAST_SQUARES_MEAN) |
|---|---|---|
| Incentives | Changes in Depressive Symptoms | 9.0 score on a scale |
| Case Management | Changes in Depressive Symptoms | 6.6 score on a scale |
| Incentives and Case Management | Changes in Depressive Symptoms | 9.1 score on a scale |
| Usual Care | Changes in Depressive Symptoms | 6.6 score on a scale |
Changes in Executive Function (BRIEF)
Changes in self-reported Executive function problems (BRIEF) will be measured from intake to completion of the intervention (4 months after intake). The Global Executive Composite (GEC) of the Behavior Rating Inventory of Executive Function (BRIEF) was used. T-scores are reported. A T-score of 50 indicates the population mean, and 10 is the standard deviation. Higher T-scores indicate worse outcomes. T-scores above 65 indicate clinically significant problems.
Time frame: Within 4 months of the intake assessment
| Arm | Measure | Value (LEAST_SQUARES_MEAN) |
|---|---|---|
| Incentives | Changes in Executive Function (BRIEF) | 55.35 T scores |
| Case Management | Changes in Executive Function (BRIEF) | 56.64 T scores |
| Incentives and Case Management | Changes in Executive Function (BRIEF) | 55.67 T scores |
| Usual Care | Changes in Executive Function (BRIEF) | 54.91 T scores |
Changes in Executive Function (Delay Discounting)
Changes in Executive function (delay discounting) will be measured from intake to completion of the intervention (4 months after intake). A 5-trial adjusting delay discounting task was used to calculate k values, numerical representations of the rate of discounting. k values range from 0 to 0.5, with larger values indicating steeper discounting (more impulsivity; greater propensity to devalue delayed rewards in favor of more immediate outcomes). k values were log(10) transformed for analysis. Larger log transformed k values indicate steeper discounting.
Time frame: Within 4 months of the intake assessment
| Arm | Measure | Value (LEAST_SQUARES_MEAN) |
|---|---|---|
| Incentives | Changes in Executive Function (Delay Discounting) | -1.82 log of k |
| Case Management | Changes in Executive Function (Delay Discounting) | -1.94 log of k |
| Incentives and Case Management | Changes in Executive Function (Delay Discounting) | -2.32 log of k |
| Usual Care | Changes in Executive Function (Delay Discounting) | -2.52 log of k |
Changes in Executive Function (DS)
Changes in Executive function (digit span) will be measured from intake to completion of the intervention (4 months after intake). The Digit Span subtest of the Wechsler Adult Intelligence Scale-IV (WAIS-IV) was used. Scores range from 1 to 19, with higher scores indicating worse outcomes.
Time frame: Within 4 months of the intake assessment
| Arm | Measure | Value (LEAST_SQUARES_MEAN) |
|---|---|---|
| Incentives | Changes in Executive Function (DS) | 8.51 score on a scale |
| Case Management | Changes in Executive Function (DS) | 8.21 score on a scale |
| Incentives and Case Management | Changes in Executive Function (DS) | 9.16 score on a scale |
| Usual Care | Changes in Executive Function (DS) | 8.87 score on a scale |
Changes in Executive Function (SST)
Changes in Executive function (Stop Signal Task) will be measured from intake to completion of the intervention (4 months after intake).
Time frame: Within 4 months of the intake assessment
| Arm | Measure | Value (LEAST_SQUARES_MEAN) |
|---|---|---|
| Incentives | Changes in Executive Function (SST) | 180.86 seconds |
| Case Management | Changes in Executive Function (SST) | 182.53 seconds |
| Incentives and Case Management | Changes in Executive Function (SST) | 221.77 seconds |
| Usual Care | Changes in Executive Function (SST) | 165.26 seconds |
Changes in Executive Function (Trail)
Changes in Executive function (Trail making task) will be measured from intake to completion of the intervention (4 months after intake). The Trail-Making subtest of the Delis-Kaplan Executive Function System (D-KEFS) was used. Scores range from 1 to 19, with higher scores indicating worse outcomes.
Time frame: Within 4 months of the intake assessment
| Arm | Measure | Value (LEAST_SQUARES_MEAN) |
|---|---|---|
| Incentives | Changes in Executive Function (Trail) | 10.19 score on a scale |
| Case Management | Changes in Executive Function (Trail) | 10.19 score on a scale |
| Incentives and Case Management | Changes in Executive Function (Trail) | 10.29 score on a scale |
| Usual Care | Changes in Executive Function (Trail) | 11.01 score on a scale |
Changes in Mental Health
Changes in mental health (Adult Self-Report) questionnaires will be measured from intake to completion of the intervention (4 months after intake) using the Achenbach System of Empirically Based Assessment (ASEBA). T-scores are reported. A T-score of 50 indicates the population mean, and 10 is the standard deviation. Higher T-scores indicate worse outcomes. T-scores above 63 indicate clinically significant problems, and those between 60 and 63 fall within the borderline clinical range.
Time frame: Within 4 months of the intake assessment
| Arm | Measure | Value (LEAST_SQUARES_MEAN) |
|---|---|---|
| Incentives | Changes in Mental Health | 54.16 T scores |
| Case Management | Changes in Mental Health | 55.58 T scores |
| Incentives and Case Management | Changes in Mental Health | 55.41 T scores |
| Usual Care | Changes in Mental Health | 52.82 T scores |
Changes in Quality of Life - Cardiac Specific
Changes in perceived quality of life (MacNew) questionnaires will be measured from intake to completion of the intervention (4 months after intake). The MacNew Heart Disease Health-Related Quality of Life Questionnaire was used. Scores range from 1 to 7, with higher scores indicating better outcomes.
Time frame: Within 4 months of the intake assessment
| Arm | Measure | Value (LEAST_SQUARES_MEAN) |
|---|---|---|
| Incentives | Changes in Quality of Life - Cardiac Specific | 5.4 score on a scale |
| Case Management | Changes in Quality of Life - Cardiac Specific | 5.4 score on a scale |
| Incentives and Case Management | Changes in Quality of Life - Cardiac Specific | 5.2 score on a scale |
| Usual Care | Changes in Quality of Life - Cardiac Specific | 5.4 score on a scale |
Changes in Quality of Life - Non-specific
Changes in perceived quality of life (EuroQoL) questionnaires will be measured from intake to completion of the intervention (4 months after intake). The Visual Analogue Scale of the EuroQol-5D-3L was used. Scores range from 0 to 100, with higher scores indicating better outcomes.
Time frame: Within 4 months of the intake assessment
| Arm | Measure | Value (LEAST_SQUARES_MEAN) |
|---|---|---|
| Incentives | Changes in Quality of Life - Non-specific | 66.0 score on a scale |
| Case Management | Changes in Quality of Life - Non-specific | 66.2 score on a scale |
| Incentives and Case Management | Changes in Quality of Life - Non-specific | 70.3 score on a scale |
| Usual Care | Changes in Quality of Life - Non-specific | 64.0 score on a scale |
Changes in Smoking Status
Changes in smoking status will be measured from intake to completion of the intervention (4 months after intake).
Time frame: Within 4 months of the intake assessment
Population: Overall number of participants analyzed represents the total number of participants from each arm of the study who completed this measure and for whom data were collected.
| Arm | Measure | Value (COUNT_OF_PARTICIPANTS) |
|---|---|---|
| Incentives | Changes in Smoking Status | 8 Participants |
| Case Management | Changes in Smoking Status | 10 Participants |
| Incentives and Case Management | Changes in Smoking Status | 11 Participants |
| Usual Care | Changes in Smoking Status | 5 Participants |
Health Care Contacts
Combined measure of number of Emergency Department (ED) visits and overnight hospitalizations.
Time frame: One year period starting at intake assessment.
| Arm | Measure | Value (NUMBER) |
|---|---|---|
| Incentives | Health Care Contacts | 113 number of visits |
| Case Management | Health Care Contacts | 180 number of visits |
| Incentives and Case Management | Health Care Contacts | 201 number of visits |
| Usual Care | Health Care Contacts | 142 number of visits |
Health Care Costs
Costs associated with combined Emergency Department (ED) visits and overnight hospitalizations.
Time frame: One year period starting at intake assessment.
Cost-effectiveness
Cost-effectiveness of the intervention will be determined. Cost-effectiveness is a single outcome (cost per per quality-adjusted life year gained) that is calculated by integrating the cost of delivering the intervention, the cost to the patient of receiving the intervention, and the benefits both in quality of life and in reductions in healthcare utilization.
Time frame: One year period starting at intake assessment.
Maintenance of Depressive Symptoms Following Intervention.
Changes in reported depressive symptoms The Beck Depression Inventory (BDI) will be measured from intervention completion until follow-up (8 months after intervention completion). BDI results will be back transformed due to data being square root transformed. Scores range from 0 to 63, with higher scores indicating worse outcomes.
Time frame: From completion of intervention (4 months) to follow-up (one-year).
Maintenance of Executive Function (BRIEF) Following Intervention.
Changes in self-reported Executive function problems (BRIEF) will be measured from intervention completion until follow-up (8 months after intervention completion). The Global Executive Composite (GEC) of the Behavior Rating Inventory of Executive Function (BRIEF) was used. T-scores are reported. A T-score of 50 indicates the population mean, and 10 is the standard deviation. Higher T-scores indicate worse outcomes. T-scores above 65 indicate clinically significant problems.
Time frame: From completion of intervention (4 months) to follow-up (one-year).
Maintenance of Executive Function (Delay Discounting) Following Intervention.
Changes in Executive function (delay discounting) will be measured from intervention completion until follow-up (8 months after intervention completion). A 5-trial adjusting delay discounting task will be used to calculate k values, numerical representations of the rate of discounting. k values range from 0 to 0.5, with larger values indicating steeper discounting (more impulsivity; greater propensity to devalue delayed rewards in favor of more immediate outcomes). k values were log(10) transformed for analysis. Larger log transformed k values indicate steeper discounting.
Time frame: From completion of intervention (4 months) to follow-up (one-year).
Maintenance of Executive Function (DS) Following Intervention.
Changes in Executive function (digit span) will be measured from intervention completion until follow-up (8 months after intervention completion). The Digit Span subtest of the Wechsler Adult Intelligence Scale-IV (WAIS-IV) was used. Scores range from 1 to 19, with higher scores indicating worse outcomes.
Time frame: From completion of intervention (4 months) to follow-up (one-year).
Maintenance of Executive Function (SST) Following Intervention.
Changes in Executive function (stop signal task) will be measured from intervention completion until follow-up (8 months after intervention completion).
Time frame: From completion of intervention (4 months) to follow-up (one-year).
Maintenance of Executive Function (Trail) Following Intervention.
Changes in Executive function (trail making task) will be measured from intervention completion until follow-up (8 months after intervention completion). The Trail-Making subtest of the Delis-Kaplan Executive Function System (D-KEFS) was used. Scores range from 1 to 19, with higher scores indicating worse outcomes.
Time frame: From completion of intervention (4 months) to follow-up (one-year).
Maintenance of Fitness Following Intervention (Estimated Metabolic Equivalent of Task)
Changes in fitness level (Estimated Metabolic Equivalent of Task) will be measured from intervention completion until follow-up (8 months after intervention completion).
Time frame: From completion of intervention (4 months) to follow-up (one-year).
Population: Overall number of participants analyzed represents the total number of participants from each arm of the study who completed this measure and for whom data were collected.
| Arm | Measure | Value (MEAN) | Dispersion |
|---|---|---|---|
| Incentives | Maintenance of Fitness Following Intervention (Estimated Metabolic Equivalent of Task) | 6.4 milliliters per kilogram per minute | Standard Deviation 3.3 |
| Case Management | Maintenance of Fitness Following Intervention (Estimated Metabolic Equivalent of Task) | 6.8 milliliters per kilogram per minute | Standard Deviation 3 |
| Incentives and Case Management | Maintenance of Fitness Following Intervention (Estimated Metabolic Equivalent of Task) | 7.4 milliliters per kilogram per minute | Standard Deviation 3.5 |
| Usual Care | Maintenance of Fitness Following Intervention (Estimated Metabolic Equivalent of Task) | 6.4 milliliters per kilogram per minute | Standard Deviation 2.8 |
Maintenance of Fitness Following Intervention (Peak Oxygen Uptake)
Changes in fitness level (peak oxygen uptake) will be measured from intervention completion until follow-up (8 months after intervention completion).
Time frame: From completion of intervention (4 months) to follow-up (one-year).
Population: Overall number of participants analyzed represents the total number of participants from each arm of the study who completed this measure and for whom data were collected.
| Arm | Measure | Value (MEAN) | Dispersion |
|---|---|---|---|
| Incentives | Maintenance of Fitness Following Intervention (Peak Oxygen Uptake) | 20.2 milliliters per kilogram per minute | Standard Deviation 5.8 |
| Case Management | Maintenance of Fitness Following Intervention (Peak Oxygen Uptake) | 18.5 milliliters per kilogram per minute | Standard Deviation 6.3 |
| Incentives and Case Management | Maintenance of Fitness Following Intervention (Peak Oxygen Uptake) | 21.3 milliliters per kilogram per minute | Standard Deviation 7.4 |
| Usual Care | Maintenance of Fitness Following Intervention (Peak Oxygen Uptake) | 19.0 milliliters per kilogram per minute | Standard Deviation 7.4 |
Maintenance of Mental Health Following Intervention.
Changes in mental health (Adult Self-Report) questionnaires will be measured from intervention completion until follow-up (8 months after intervention completion) using the Achenbach System of Empirically Based Assessment (ASEBA). T-scores are reported. A T-score of 50 indicates the population mean, and 10 is the standard deviation. Higher T-scores indicate worse outcomes. T-scores above 63 indicate clinically significant problems, and those between 60 and 63 fall within the borderline clinical range.
Time frame: From completion of intervention (4 months) to follow-up (one-year).
Maintenance of Quality of Life (Cardiac-specific) Following Intervention.
Changes in perceived quality of life (MacNew) questionnaires will be measured from intervention completion until follow-up (8 months after intervention completion). The MacNew Heart Disease Health-Related Quality of Life Questionnaire was used. Scores range from 1 to 7, with higher scores indicating better outcomes.
Time frame: From completion of intervention (4 months) to follow-up (one-year).
Maintenance of Quality of Life (Noncardiac-specific) Following Intervention.
Changes in perceived quality of life (EuroQoL) questionnaires will be measured from intervention completion until follow-up (8 months after intervention completion). The Visual Analogue Scale of the EuroQol-5D-3L was used. Scores range from 0 to 100, with higher scores indicating better outcomes.
Time frame: From completion of intervention (4 months) to follow-up (one-year).
Maintenance of Smoking Status Following Intervention.
Changes in smoking status will be measured from intervention completion until follow-up (8 months after intervention completion).
Time frame: From completion of intervention (4 months) to follow-up (one-year).
Population: Overall number of participants analyzed represents the total number of participants from each arm of the study who completed this measure and for whom data were collected.
| Arm | Measure | Value (COUNT_OF_PARTICIPANTS) |
|---|---|---|
| Incentives | Maintenance of Smoking Status Following Intervention. | 7 Participants |
| Case Management | Maintenance of Smoking Status Following Intervention. | 9 Participants |
| Incentives and Case Management | Maintenance of Smoking Status Following Intervention. | 12 Participants |
| Usual Care | Maintenance of Smoking Status Following Intervention. | 3 Participants |
Maintenance of Waist Circumference Following Intervention.
Changes in waist circumference will be measured from intervention completion until follow-up (8 months after intervention completion).
Time frame: From completion of intervention (4 months) to follow-up (one-year).
Population: Overall number of participants analyzed represents the total number of participants from each arm of the study who completed this measure and for whom data were collected.
| Arm | Measure | Value (MEAN) | Dispersion |
|---|---|---|---|
| Incentives | Maintenance of Waist Circumference Following Intervention. | 42.5 inches | Standard Deviation 7.1 |
| Case Management | Maintenance of Waist Circumference Following Intervention. | 44.2 inches | Standard Deviation 8.8 |
| Incentives and Case Management | Maintenance of Waist Circumference Following Intervention. | 42.0 inches | Standard Deviation 7 |
| Usual Care | Maintenance of Waist Circumference Following Intervention. | 42.2 inches | Standard Deviation 7.4 |