Table 4.

Multivariate analysis, Cox proportional hazard model

Risk factor	Relative risk	95% Confidence interval	P-value
Age	–0.011	0.956-1.023	0.521
Sex, female*	1.065	1.319-6.384	0.008
Body mass index*	0.147	1.030-1.192	0.006
Vein size	0.320	0.852-2.228	0.192
Catheterized vein	–0.413	0.282-1.550	0.341
Diagnosis	–0.214	0.582-1.120	0.200
Reason for catheter insertion	0.278	0.890-1.960	0.168
Intensive care unit	–0.544	0.175-1.927	0.374

*P<0.05.