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Table 4 The results of tendency chi-square test about the relation of MDR-AB infection with the age and the days of mechanical ventilation

From: A multi-center study on the risk factors of infection caused by multi-drug resistant Acinetobacter baumannii

Exposure factors

Observed cases

Cases of MDR-AB

Infection rate (%)

OR

Χ2

P

Age (years)

 0

13

2

15.38

1.00

58.62

< 0.001

 20

69

16

23.19

1.36

 40

127

37

29.13

1.41

 60

184

72

39.13

1.64

 80

96

68

70.83

3.43

Mechanical ventilation (days)

 0

102

18

17.65

1.00

43.36

< 0.001

 10

247

94

38.06

2.87

 20

140

83

59.29

6.80