Table 5.

Effect of the intervention on the incidence of catheter dysfunction among tunneled catheters estimated from 3-level Poisson regression models, with random effects for service and patients nested within service, and fixed effects for calendar time and patient and catheter characteristics

Effect of the intervention on catheter dysfunction incidence	Incidence rate ratio	95% CI	P-value
Adjusted for calendar time	0.65	0.47–0.90	0.009
Adjusted for calendar time and catheter site	0.68	0.49–0.94	0.019
Adjusted for calendar time, catheter site, participant age, gender, diabetes mellitus, reason for catheter insertion, and department responsible for insertion	0.68	0.49–0.94	0.019

CI, confidence interval.