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. 2012 Oct 2;5:26. doi: 10.1186/1755-7682-5-26

Table 4.

Intrinsic and extrinsic risk factors for Hospital Acquired Infection: univariate and multi-variate analysis (logistic regression)

  Infected patients (%) Univariate analysis
Multivariate analysis
OR* 95% CI pvalue OR* 95% CI pvalue
Age (years)
 
 
 
 
 
 
 
 ≤ 15
8.5
1.07
0.6-1.9
0.815
1.03
0.47-2.28
0.939
 16 - 40
9.6
1.22
0.7-2.1
0.450
1.24
0.67-2.57
0.65
 41 - 60
8.0
1
 
 
1
 
 
 > 60
15.1
2.05
1.2-3.6
0.012
2.71
1.21-4.95
0.006
Gender
 
 
 
 
 
 
 
 Female
9.3
1
 
 
 
 
 
 Male
10.1
1.09
0.7-1.6
0.66
 
 
 
Length of hospital stay (days)
 
 
 
 
 
 
 
 ≤ 5
3.5
1
 
 
1
 
 
 6 - 10
9.5
2.87
1.4-5.7
0.003
3.79
1.68- 8.93
0.001
 11 - 20
11
3.40
1.7-6.8
0.01
4.40
1.83-10.61
0.001
 > 20
16.1
5.26
2.7-10.1
<0.001
9.6
3.63-18.51
<0.001
Provenance
 
 
 
 
 
 
 
 Home
8.5
1
 
 
1
 
 
 Hospital
1.1
1.77
1.2-2.7
0.07
1.45
0.84-2.50
0.18
MacCabe index
 
 
 
 
 
 
 
 Non fatal disease
6 .3
1
 
 
1
 
 
 Ultimately fatal disease
14.5
2.5
1.7-3.8
<0.001
2.01
1.21-3.36
0.007
 Rapidly fatal disease
20.3
3.8
1.9-7.6
<0.001
2.50
0.99-6.27
0.051
Immune deficiency
 
 
 
 
 
 
 
 No
10
1
 
 
 
 
 
 Yes
8.2
0.80
0.46-1.40
0.44
 
 
 
Diabetes
 
 
 
 
 
 
 
 No
6.7
1
 
 
1
 
 
 Yes
17.4
1.57
0.86-2.85
0.14
0.98
0.44-2.14
0.95
Surgery
 
 
 
 
 
 
 
 No
6.9
1
 
 
1
 
 
 Yes
20.8
3.55
2.37-5.29
<0.001
1.06
0.61-1.85
0.83
Intravascular catheter
 
 
 
 
 
 
 
 No
6.3
1
 
 
1
 
 
 Yes
21.0
3.95
2.67-5.86
<0.001
1.75
1.0-3.1
0.048
Urinary catheter
 
 
 
 
 
 
 
 No
5.5
1
 
 
1
 
 
 Yes
50
17.32
11.03-27.2
<0.001
9.84
5.16-17.55
<0.001
Mechanical ventilation
 
 
 
 
 
 
 
 No
9
1
 
 
1
 
 
 Yes
71.4
25.35
7.82-82.2
<0.001
3.43
0.70-17.00
0.131
Antimicrobials
 
 
 
 
 
 
 
 No
4.4
 
 
 
1
 
 
 Yes 20.7 5.72 3.76-8.78 <0.001 5.69 3.37-9.61 <0.001

* Odds Ratio.