Electronic medical record-based multicondition models to predict the risk of 30 day readmission or death among adult medicine patients: validation and comparison to existing models

Table 2 Final electronic multicondition multivariate model of risk of 30 day readmission or death^a

Risk factor	Adjusted odds ratio (95 % C.I.)	P value
SpO2 < = 94	1.11 (1.02 - 1.21)	0.012
BUN < = 20	0.84 (0.77 - 0.92)	0.000
Systolic BP < = 100	1.12 (1.03 - 1.22)	0.007
Diastolic BP < = 62	1.37 (1.05 - 1.79)	0.019
Pulse > 99	1.29 (1.19 - 1.40)	0.000
Sodium > 145	1.48 (1.16 - 1.88)	0.001
BNP > 2400 or NT proBNP > 18000	1.28 (1.02 - 1.61)	0.034
Anion Gap > 18	1.57 (1.19 - 2.06)	0.001
Albumin < = 2	1.83 (1.34 - 2.50)	0.000
Albumin 2 – 3	1.45 (1.31 - 1.61)	0.000
CO2 > 30	1.34 (1.10 - 1.64)	0.004
CPK < = 60	1.20 (1.07 - 1.35)	0.002
HCT > 35	0.80 (0.74 - 0.87)	0.000
Lymphocyte < = 1.3	1.11 (1.01 - 1.21)	0.023
MCV > 100	1.24 (1.03 - 1.49)	0.022
Platelets < = 90	1.51 (1.24 - 1.84)	0.000
Platelets > 350	1.32 (1.16 - 1.49)	0.000
PT > 35	2.05 (1.42 - 2.96)	0.000
TSH > 7	1.48 (1.11 - 1.98)	0.008
AST > 40	1.28 (1.14 - 1.42)	0.000
Medicare payor	1.19 (1.08 - 1.31)	0.000
Medicaid payor	1.79 (1.55 - 2.08)	0.000
Male	1.14 (1.05 - 1.24)	0.001
Elective admission status	0.67 (0.59 - 0.77)	0.000
Prior ED visits in past year	1.03 (1.02 - 1.05)	0.000
Prior hospitalizations in past year	1.17 (1.13 - 1.21)	0.000
Age	1.01 (1.01 - 1.02)	0.000
Charlson Comorbidity index	1.09 (1.07 - 1.12)	0.000

Abbreviations. BUN, blood urea nitrogen; BP, blood pressure; BNP, B-natriuretic peptide; CO₂, carbon dioxide; CPK, creatinine kinase; TSH, thyroid stimulating hormone; AST, aspartate aminotransferase; HCT, hematocrity; MCV, mean cell volume ^aDerivation cohort; composite outcome of 30-day readmission or mortality

ISSN: 1472-6947