Table 3 Univariate and unconditional multiple logistic regression analysis of the association of demographic and clinical characteristics of patients admitted for all MDCs (excluding HIV/AIDS) with long hospital stay

Males

493

7861

<0.41^a

1

Females

315

5283

1.01

0.87-1.17

0.88

0.74-1.03

Italian born people (Ref)

660

12181

<0.0001 ^a

1

1

Foreign born people

148

956

2.86

2.36-3.45

1.22

0.96-1.54

Class of age

<0.0001 ^a

15-24 years (ref)

48

1079

1

1

25-34 years

116

2452

1.13

0.76-1.69

1.15

0.74-1.78

35-44 years

112

2485

1.19

0.80-1.77

0.85

0.54-1.32

45-54 years

123

1689

2.02

1.36-2.99

1.19

0.76-1.84

55-64 years

119

1656

1.92

1.30-2.85

1.02

0.65-1.59

65-74 years

167

1980

2.35

1.61-3.42

1.10

0.72-1.70

> 74 years

184

2279

2.34

1.61-3.40

1.08

0.70-1.75

N of ICD-9 codes

1 (ref)

118

4063

<0.0001 ^a

1

1

2

122

3755

1.50

1.11-2.02

1.16

0.85-1.58

3

163

2684

2.83

2.14-3.75

1.87

1.38-2.54

4

169

1709

4.74

3.58-6.28

2.99

2.20-4.07

5

102

713

7.04

5.17-9.59

4.16

2.95-5.87

6

191

750

12.54

9.49-16.56

8.02

5.89-10.93

N of ICD-9 procedures

0 (ref)

313

8627

<0.0001 ^a

1

1

1

164

2500

1.96

1.59-2.41

1.89

1.52-2.35

2

106

1321

2.37

1.86-3.02

1.87

1.43-2.44

3

110

636

5.41

4.25-6.87

4.10

3.16-5.34

4

57

321

5.43

4.06-7.56

4.08

2.92-5.68

5

54

169

10.06

7.23-14.0

6.59

4.55-9.55

6

65

148

13.82

10.07-18.98

7.97

5.61-11.33