Objective      To investigate the influencing factors and differences in catheter-associated urinary tract infections (CAUTI) in critical patients.       Methods      A prospective investigation was carried out on critical inpatients with indwelling urinary catheter from 13 departments of a Grade A Class Ⅲ hospital during August 2014 and April 2015. Our self-made survey form which had been verified for its reliability and validity was used to explore the influencing factors and analyze the differences between those with catheter inserted in their own departments and those with catheterization before admission or in other departments.       Results      Among the 417 patients with urinary catheter inserting in their own departments

there were 56 patients suffering from CAUTI. Multivariate analysis showed that the influencing factors were female (OR=5.937

95%CI: 1.474～23.909)

inserting catheter in ICU (OR=60.499

95%CI: 1.455～2515.992)

not connected the ureter with urine tubes and collection bags in advance (OR=5.585

95%CI: 1.278～24.411)

touching the distal part of catheter (OR=9.802

95%CI: 2.413～39.816)

indwelling time of catheter ≥7 d (OR=47.652

95%CI: 9.733～233.297)

indwelling time of catheter ≥14 d (OR=334.843

95%CI: 56.700～1977.434)

and rubber urinary catheter (OR=0.158

95%CI: 0.037～0.671). For the 237 patients with catheter before admission

there were 38 suffering from CAUTI

and the influencing factors were indwelling time of catheter ≥7d (OR=7.277

95%CI: 2.004～26.420)

indwelling time of catheter ≥14 d (OR=57.492

95%CI: 16.549～199.728)

not replacing the drainage bag (OR=3.429

95%CI: 1.245～9.443)

and rubber urinary catheter (OR=0.323

95%CI: 0.123～0.846). The analysis on the influencing factors for CAUTI between the 2 groups showed that cardiovascular disease

chronic respiratory diseases

triple lumen catheter

replacing the drainage bag and conventional drainage bag influenced greater on the group of inserting catheter in their own department than the group with catheter at admission

but indwelling time and rubber urinary catheter had slight effects (P0.05).       Conclusion      Female

inserting catheter in ICU

not connecting to the ureter with urine tube and collection bags in advance

touching the distal part of catheter and indwelling time of catheter are risk factors for the patients with catheterization in their own departments

but rubber urinary catheter is a protective factor. However

indwelling time of catheter and not replacing the drainage bag are risk factors for those with catheter at admission

but rubber urinary catheter is a protective factor too. Therefore

it is of great significance to prevent these risk factors and take targeted intervention to reduce the incidence of infection.