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Table 2 Risk Scores’ calibration performance

From: Predicting 7-day, 30-day and 60-day all-cause unplanned readmission: a case study of a Sydney hospital

 

7-day Readmission (β0 =  − 4.72,  β1 = 0.14)

30-day Readmission (β0 =  − 4.02,  β1 = 0.13)

60-day Readmission (β0 =  − 3.79,  β1 = 0.13)

Number of admissions

Observed readmission rate (%)

Expected readmission rate (%)

Number of admissions

Observed readmission rate (%)

Expected readmission rate (%)

Number of admissions

Observed readmission rate (%)

Expected readmission rate (%)

score = 0

641

0.6

0.9

185

1.1

1.8

135

2.2

2.2

score = 10

1003

3.4

3.4

893

5.8

6.3

707

8.5

7.6

score = 20

98

12.2

12.0

101

21.8

20.4

156

22.4

23.2

score = 30

7

28.6

34.9

10

50.0

49.1

18

55.6

52.5

  1. Readmission \( Risk\ (S)=\frac{e^{\left({\beta}_0+S\ast {\beta}_1\right)}}{1+{e}^{\left({\beta}_0+S\ast {\beta}_1\right)}} \), where S = score, β0=intercept, β1=normalization parameter (full details in Additional file 1: Table S7)