Predictor outputs for frailty risk prediction model (dependent variables)
| Name | Time span | Description | Comments |
| In-hospital mortality | Current spell | Indicates if the discharge method was death | |
| 30 day non-elective readmission | 30 days from discharge | Indicates if the patient had an emergency admission with admission date between 1 and 30 days following the discharge date of the index admission | Spells that ended in death are excluded from the analysis |
| Long length of stay | Current spell | Upper quartile length of hospital stay for country |