Predictors inputs for frailty risk prediction model (independent predictors)
| Name | Time span | Description | Comments |
| Age | Current spell | Age on admission | |
| Gender | Current spell | Gender on admission | |
| Country | Current spell | Country from which hospital contributed data | Nominal; countries were: Australia Belgium Denmark Finland Italy Netherlands Norway UK USA |
| Dementia & delirium | 12 month historical binary indicator | A binary flag indicating whether a relevant diagnosis has been received during any inpatient spell in the past 12 months | Final Dr Foster global frailty score is weighted (see risk stratification models section for further details) |
| Mobility problems | |||
| Falls & fractures | |||
| Pressure ulcers & weight loss | |||
| Dependence and care | |||
| Anxiety & depression | |||
| Comorbidity (Elixhauser) | 12 month historical score | A weighted score (see risk stratification models section for further details) | Integer |
| Number of previous admissions | 12 month historical count | The number of emergency admission spells in the previous 12 months, excluding the current spell | Integer |