Table 2 Multivariable logistic regression (adjusted) results when the PPI Tool risk classes were divided into high-risk and low-risk classes, n=627

Gender

 Male

27

 Female

41

0.04

1.198

1.04

1.97

Age

 < 40

12

 40–65

27

0.21

1.72

0.74

4.01

 66–80

38

0.04

2.38

1.02

5.50

 > 80

83

<0.01

5.89

2.26

15.21

Length of stay in days

 < 1

10

 1–4

48

<0.01

6.06

3.16

11.60

 5–7

27

0.04

3.19

1.45

7.05

 >7

40

<0.01

6.52

2.87

14.78

Did the patient have a surgical procedure during the hospital stay

 No

21

 Yes

38

0.01

1.96

1.12

3.44

Mode of arrival

 Emergency care

19

 Elective

56

<0.01

5.83

3.23

10.50

 Other

16

<0.79

0.80

0.398

2.02