Table 1.

Predictor and outcome variables for risk prognostic model

VariableTime spanDescription
Predictor variables
AgeCurrent spellAge on admission
GenderCurrent spellGender on admission
Dementia
Mobility problems
Falls and fractures
Pressure ulcers
12-month historic binary indicatorA binary flag indicating whether a relevant diagnosis has been received during any inpatient spell in the past 12 months
Functional dependence
Anxiety and depression
Incontinence
Delirium
Senility
Number of previous admissions12-month historic countContinuous integer of the number of emergency admission spells in the previous 12 months, excluding the current spell
Outcome variables
In-hospital mortalityCurrent spellIndicates if the discharge method was death
Long length of stayCurrent spellUpper quartile length of hospital stay