Surveillance on secular trends of incidence and mortality for device–associated infection in the intensive care unit setting at a tertiary medical center in Taiwan, 2000–2008: A retrospective observational study

Table 1 Incidence and device–utilization ratio in device–associated infections from 2000 to 2008

Device type	2000	2001	2002	2003	2004	2005	2006	2007	2008	Overall	pvalue
Patient days	13,915	14,144	14,144	14,021	14,274	14,206	13,753	14,049	13,809	126,315
Ventilator–associated pneumonia, n	21	47	32	44	41	29	23	30	25	292
Ventilator–days	11,211	8,941	9,101	9,246	9,420	11,121	10,778	11,545	10,548	91,911
Rate per 1000 ventilator–days	1.87	5.26	3.52	4.76	4.35	2.61	2.13	2.60	2.37	3.18	<0.001
DU ratio	0.81	0.63	0.64	0.66	0.66	0.78	0.78	0.82	0.76	0.73	<0.001
Catheter–associated urinary tract infection, n	48	37	33	38	40	19	22	64	51	352
Urinary catheter–days	12,231	11,233	9,208	9,140	9,426	11,268	10,965	11,104	9,077	93,652
Rate per 1000 urinary catheter–days	3.92	3.29	3.58	4.16	4.24	1.69	2.01	5.76	5.62	3.76	<0.001
DU ratio	0.88	0.79	0.65	0.65	0.66	0.79	0.80	0.79	0.66	0.74	0.166
Central line–associated bloodstream infection, n	28	26	16	18	16	15	25	22	23	189
Central line–days	12,773	7,480	7,531	7,819	7,546	12,494	11,502	11,833	10,526	89,504
Rate per 1000 central line–days	2.19	3.48	2.12	2.30	2.12	1.20	2.17	1.86	2.19	2.11	<0.001
DU ratio	0.92	0.53	0.53	0.56	0.53	0.88	0.84	0.84	0.76	0.71	<0.001

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