Table 1.

Predictor and outcome variables for risk prognostic model

VariableTime spanDescription
Predictor variables
AgeCurrent spellAge on admission
GenderCurrent spellGender on admission
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
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