Table 2 Correlation of derivation and validation datasets

Gender

0.099

0.135

0.175

Race

≤0.001

≤0.001

0.002

Marital status

0.406

0.499

0.632

Religion

≤0.001

≤0.001

≤0.001

Insurance/Finance class

≤0.001

≤0.001

0.009

Age_At_Admission (Age)

0.023

≤0.001

≤0.001

(64.39/15.8)

(64.38/15.89)

(63.79/15.82)

Home proximity

0.011

≤0.001

≤0.001

(93.2/205.64)

(93.65/206.78)

(95.73/196.36)

Mean household income

0.011

≤0.001

≤0.001

(65650/19673.84)

(65630/19599.2)

(65580/19612)

Discharge disposition

0.02

0.01

0.01

Hospital services

0.19

0.236

0.43

Length of Stay(LOS)

≤0.001

≤0.001

≤0.001

(7.46/9.16)

(7.56/9.33)

(7.73/196.36)

CharlsonIndexF frequency

≤0.001

≤0.001

≤0.001

(4.87/2.84)

(4.87/2.83)

(4.92/2.89)

18 CCS Categories

≤0.001

≤0.001

≤0.001

(0.062-4.94)/

(0.065-5.01)/

(0.069-5.03)/

(0.270-2.55)

(0.277-2.55)

(0.287-2.6)

Lab tests

≤0.001

≤0.001

≤0.001

(0.025-1430)/

(0.026-1456)/

(0.026-1446)/

(0.047-130.57)

(0.047-130.41)

(0.049-132.82)

4 Vital sign variables

≤0.001

≤0.001

≤0.001

LAST SBP (LSBP)

(110.5/21.65)

(110.7/21.4)

(110.7/21.4)

LAST HR (LHR)

(79.71/15.92)

(79.88/15.98)

(79.77/15.91)

FIRST WT KG(FW)

(92.57/31.34)

(92.57/31.57)

(93.18/31.35)

LAST WT KG(LW)

(89.93/42.47)

(90.1/43.23)

(90.88/44.57)

6-month Prior:

Mean CharlsonIndexF

≤0.001

≤0.001

≤0.001

Frequency

(2.99/7.5)

(3.04/7.615)

(3.08/7.7)

ED Frequency (EDF)

≤0.001

≤0.001

≤0.001

Mean EDLOS

≤0.001

≤0.001

≤0.001

(0.16/0.17)

(0.15/0.13)

(0.15/0.13)

Number of Yes/No records

608/141

597/132

471/121

Readmission

0.0004

0.0002

0.0001