This measure specifically assesses medication adherence and some of its potential barriers in patients with CAD or other chronic diseases. Total scores range from 0 to 32, higher scores indicate higher reported medication adherence.

Patients will be asked if they participated in a formal rehabilitation program at each time point with two validated interview items. Attendance will be assessed by reviewing records of the 12-week cardiac rehabilitation programs. With written permission from patients or next of kin, records of attendance to programs outside of the study hospitals will be obtained from archives departments. Participation will be categorized as follows:

• Non-attendance: patients who did not attend a cardiac rehabilitation program.
• Level of adherence: calculated with the percentage of the prescribed sessions attended during the program.
• Completion: patients who attended at least 70% of the planned sessions.
• Discontinuation: patients who stopped attending cardiac rehabilitation at least 3 weeks before the end of the program.

Level of physical activity: This parameter will be assessed with the validated French version of the International Physical Activity Questionnaire - Short Form. This questionnaire generates an average amount of time spent per week doing physical activity across activity domains. A higher mean time represents more physical activity on average.

Smoking status: This variable will be assessed using the validated self-report items developed by Statistics Canada to assess the current smoking status. Smoking status will be established based on the patients' self-reported smoking behaviour in the 30 days preceding each time point. Participants can be categorized as Non-Smokers, Occasional-Smokers or Regular Smokers.

Alcohol use: The patients' compliance with recommendations regarding alcohol consumption will be assessed with the first 3 items of the validated French version of the Alcohol Use Disorders Identification Test. Total scores range from 0 to 12, higher scores indicate higher alcohol use.

Fruit and vegetable intake: Patients' usual consumption of fruit and vegetables will be assessed using the 6-item Fruit and Vegetable Questionnaire (FV-Q) validated questionnaire. This questionnaire generates a mean daily consumption of fruits and vegetables. A higher mean represents more servings consumed for each specific category.

Health-related quality of life: The 12-item Short-Form Health Survey Version 2 (SF-12v2) will be used to assess patients Health-related quality of life.

Total scores range between 0 and 100, with higher scores indicating a better HRQOL.

Anxiety and depressive symptoms will be measured with the validated French version of the Hospital Anxiety and Depression Scale.

Total scores range between 0 and 21, with higher scores indicating a higher level of anxiety/depression.

Heart- focused anxiety will be assessed with the French version of the Cardiac Anxiety Questionnaire. Total scores range between 0 and 20, with higher scores indicating a higher level of heart-focused anxiety.

The PCL-5 is a 20-item self-report questionnaire that assesses post-traumatic stress disorder (PTSD) symptoms according to DSM-5 criteria. In this study, the PCL will be used to assess symptom severity and to make a provisional PTSD diagnosis.

Total scores range between 0 and 80, with higher scores indicating a higher level of PTSD.

Social support will be assessed with the validated French version of the Modified MOS Social Support Survey. This questionnaire generates two distinct subscales, emotional and instrumental support. Each subscale score ranges from 0 to 20, with higher scores representing more perceived support.

Depression, agoraphobia, health anxiety and somatic symptom disorders will be assessed with the ADIS-5.