Table 2. Bacterial pathogens isolated from intubated patients in ICU patients at the Hospital for Tropical Diseases in Ho Chi Minh City, Vietnam.

Pathogen	2000	2001	2002	2003	2004	2005	2006	2007	2008	2009	2010	Mean	OR*	P value*	95 % CI
	[n (%)]	[n (%)]	[n (%)]	[n (%)]	[n (%)]	[n (%)]	[n (%)]	[n (%)]	[n (%)]	[n (%)]	[n (%)]	[n (%)]
Acinetobacter spp.	6	17	19	20	32	14	16	16	12	19	35	19	1.066	0.022	1.01–1.12
	(35.3)	(27.9)	(23.2)	(25.3)	(27.1)	(38.9)	(26.7)	(27.1)	(23.1)	(34.6)	(45.5)	(30.4)
K. pneumoniae	5	13	24	18	19	3	6	11	4	7	8	11	0.873	<0.001	0.83–0.94
	(29.4)	(21.3)	(29.3)	(22.8)	(16.1)	(8.3)	(10.0)	(18.6)	(7.7)	(12.7)	(10.4)	(17.0)
P. aeruginosa	4	20	22	26	36	11	21	13	12	12	9	17	0.917	0.004	0.86–0.97
	(23.5)	(32.8)	(26.8)	(32.9)	(30.5)	(30.6)	(35.0)	(22.0)	(23.1)	(21.8)	(11.7)	(26.4)
Streptococcus pneumoniae	0	5	8	1	3	1	0	2	2	0	2	2	0.842	0.028	0.72–0.98
	(0.0)	(8.2)	(9.8)	(1.3)	(2.5)	(2.8)	(0.0)	(3.4)	(3.9)	(0.0)	(2.6)	(3.1)
Staphylococcus aureus	2	3	3	2	8	2	9	4	5	9	6	5	1.117	0.021	1.02–1.23
	(11.8)	(4.9)	(3.7)	(2.5)	(6.8)	(5.6)	(15.0)	(6.8)	(9.6)	(16.6)	(7.8)	(8.3)
Other Gram-negative bacteria†	0	3	6	10	20	5	8	13	17	8	17	11	1.207	<0.001	1.18–1.23
	(0.0)	(4.8)	(7.2)	(12)	(17)	(13.9)	(13.3)	(22.1)	(32.9)	(14.5)	(22.1)	(14.8)

^*Determined by logistic regression.

^†Other Gram-negative bacteria include Proteus spp., Alcaligenes spp., Citrobacter spp., Providencia spp., Serratia spp., Escherichia coli, Enterobacter spp., Burkholderia spp., Chryseobacterium sp., Haemophilus spp. and Stenotrophomonas maltophilia.