Skip to main content

Table 1 Optimal coding exploration for continuous predictors (complete case analysis)

From: Development of a prognostic model for 1-year survival after fragile hip fracture in Chinese

Predictor

Coding

Waldχ2

df

p value

Age

Linear

24.96

1

 < .0001

 

RCS (3)

22.03

2

 < .0001

 

RCS (4)

23.90

3

 < .0001

 

RCS (5)

23.62

4

0.0001

BS

Linear

0.61

1

0.4345

 

RCS (3)

0.77

2

0.6798

 

RCS (4)

5.66

3

0.1291

 

RCS (5)

6.39

4

0.1719

SC

Linear

13.27

1

0.0003

 

RCS (3)

12.77

2

0.0017

 

RCS (4)

13.94

3

0.0030

 

RCS (5)

13.96

4

0.0074

 

Log

11.25

1

0.0008

Hb

Linear

10.19

1

0.0014

 

RCS (3)

15.14

2

0.0005

 

RCS (4)

14.65

3

0.0021

 

RCS (5)

15.36

4

0.0040

ALB

Linear

33.97

1

 < .0001

 

RCS (3)

31.76

2

 < .0001

 

RCS (4)

31.30

3

 < .0001

 

RCS (5)

32.07

4

 < .0001