Table 3.

Bacterial Pathogen Distribution for GC-HCAP, GC-CAP, and Non-GC Patients

Patient Characteristics	Overall	GC- HCAP	GC- CAP	Non- GC	GC-HCAP versus GC-CAP (p-value)	GC-HCAP versus Non- GC (p-value)
All patients, n	3,593	944	808	1,841
Organism identified	25.6	36.4	18.9	22.9	<0.0001	<0.0001
Single organism identified	21.9	30.1	16.8	19.9	<0.0001	<0.0001
Multiple organisms identified	3.7	6.4	2.1	3.0	<0.0001	<0.0001
Culture-positive patients, n	919	344	153	422
Gram-positive pathogens
S. pneumoniae	16.4	12.2	33.3	13.7	<0.0001	0.53
Streptococcus other	3.6	2.3	6.5	3.6	0.02	0.32
Staphylococcus aureus	37.5	43.3	26.8	36.7	0.0005	0.06
Gram-negative pathogens
K. pneumoniae	8.7	10.2	3.3	9.5	0.009	0.75
Pseudomonas	17.1	21.8	7.2	16.8	<0.0001	0.08
H. influenzae	4.1	1.2	10.5	4.3	<0.0001	0.01
E. coli	3.6	5.2	1.3	3.1	0.04	0.13
Other gram- negatives	4.6	2.9	5.9	5.5	0.11	0.08
Atypical pathogens
Legionella	1.4	1.2	2.6	1.2	0.24	0.98
Mycoplasma	0	0	0	0	--	--
Chlamydia	0	0	0	0	--	--
Anaerobes	0.4	0.6	0.7	0.2	0.92	0.45

GC-HCAP: guideline-concordant healthcare-associated pneumonia

GC-CAP: guideline-concordant community-acquired pneumonia

GC: guideline-concordant