Predicting out of intensive care unit cardiopulmonary arrest or death using electronic medical record data

Table 3 Multivariate predictors of RED events (derivation cohort, N= 23,127)

Variables	Odds Ratio (95% CI)	P Value
*Demographics/Laboratory/Vital Signs*
Age >54 years	1.59 (1.24 - 2.04)	<0.001
SpO2 (%) (min) ≤86	1.73 (1.04 - 2.88)	0.03
Diastolic BP (mm Hg) (max) >120	3.17 (1.16 - 8.66)	0.03
AST (U/L) (min) >250	2.89 (1.62 - 5.17)	<0.001
pCO2 (mm Hg) (max) ≤22	3.72 (1.64 - 8.40)	0.002
pCO2 (mm Hg) (max) >70	4.61 (1.84 - 11.56)	0.001
WBC (10³ cells/mm³) (min) >11	1.36 (1.03 - 1.79)	0.03
Platelets (10³ cells/mm³) (min) <100	1.76 (1.18 - 2.64)	0.01
Potassium (mEq/dL) (max) >5.1	1.77 (1.22 - 2.56)	0.003
*Orders*
Arterial Blood Gas	2.08 (1.52 - 2.85)	<0.001
Electrocardiogram	2.05 (1.54 - 2.73)	<0.001
Stat Physician Order ^a	2.20 (1.53 - 3.16)	<0.001
*Summary Variable*
High Risk Floor Assignment ^b	5.71 (4.34 - 7.51)	<0.001
MEWS ^c	1.36 (1.28 - 1.44)	<0.001
Derivation: 0.87 (0.85 - 0.89) - 298 events
Validation: 0.85 (0.82 - 0.87) - 287 events

a Stat orders for head magnetic resonance imaging or computed tomography scan, chest plain film x-rays or computed tomography scan, and abdominal ultrasonography; b includes floors that comprise the top 15% of events; c elements consists of systolic blood pressure, heart rate, respiratory rate, temperature, and level of consciousness.

ISSN: 1472-6947