Factors, outcome variables and their definitions to be included in the case-mix analysis
| Variable | Definition |
| Factors | |
| Resident | Each unique resident |
| Site | Hospital site of call shift |
| Time | Academic year (each academic year is between 1 July and 30 June of the next year, not level resident level of training) |
| Outcome variables | |
| Demographic outcomes | |
| Patient age | Age of patient on admission |
| Patient sex | Biological sex of patient |
| Long-term residence | If the patient resided in a long-term care residence prior to admission |
| Volume Outcomes | |
| Volume | Number of admissions per call shift |
| Breadth outcomes | |
| Primary discharge diagnosis | Most responsible diagnosis assigned to the admission on discharge |
| Complexity outcomes | |
| Comorbidities | Pre-existing diagnoses associated with the patient that are not the primary discharge diagnosis |
| Charlson Comorbidity Index (CCI) | CCI derived from patient age and comorbidities at the time of discharge |
| Hospital Frailty Risk Score (HFRS) | HFRS derived from admission diagnoses and comorbidities at the time of discharge |
| Readmission | Patients with an admission toan acute care hospital in the past 30 days i |
| Acuity outcomes | |
| Laboratory Acute Physiology Score (LAPS) | LAPS derived from the earliest set of laboratory values available during admission |
| In-hospital death | Patient death during the hospital admission (divided into overall admission, within 48 hours and within 7 days) |
| Intensive care transfer | Patients requiring a subsequent intensive care unit admission after an initial admission to the internal medicine department (divided into overall admission, within 48 hours and within 7 days) |