Table 4: Relationships between ICU length of stay and the occurrence of CLA-BSI in patients (n=499).

Variable Infection
No. %
No infection
No. %
Chi-Square P value
ICU length of stay
<5 days (n=299)
≥5 days (n=200)
4
15
1.3
7.5
295
185
98.7
92.5
12.4 0.000*
APACHE II score
Low risk <15 (n=363)
High risk ≥15 (n=114)
10
9
2.8
7.9
353
105
97.2
92.1
5.9 0.01*
Inserted Medical devices
Medical devices (n=340)
Urinary catheter (n=287)
Central venous line (n=310)
Mechanical ventilation (n=294)
15
13
13
16
4.4
4.5
4.2
5.4
325
274
297
278
95.6
95.5
95.8
94.6
1.0
0.9
0.3
5.2
0.3
0.3
0.5
0.02*
Site of CVC insertion
Jugular (n=430)
Subclavian (n=53)
Femoral (n=2)
Mahurkar (n=14)
12
6
0
1
2.8
11.3
0
7.1
418
47
2
13
97.2
88.7
100
92.9
9.8 0.02*
Place of admission
Unknown (n=6)
Other hospital (n=33)
Same hospital (n=364)
Home (n=96)
0
2
15
2
0
6.1
4.1
2.1
6
31
349
94
100
93.9
95.9
97.9
1.5 0.6

*Medical devices include a urinary catheter, central venous line and mechanical ventilator.