Table 1.

Clinical characteristics of K. 1pneumoniae bacteremia strains.

Characteristics	No. isolates	OD550 (mean ± SD)	P-value
Total no. isolates tested	250	1.23 ± 0.52
Patient characteristics
Male	155	1.24 ± 0.52	0.765
Female	95	1.22 ± 0.51
Age < 40 years	49	1.42± 0.69	0.002a
40 years ≤ age ≤ 65 years	120	1.26 ± 0.47
65 years < age	81	1.07 ± 0.40
Comorbidity			0.125
Pulmonary disease	21	1.21 ± 0.53
Cancer	43	1.06 ± 0.36
Heart disease	48	1.25 ± 0.45
Stroke	17	1.13 ± 0.28
Kidney disease	20	1.25 ± 0.46
Diabetes mellitus	58	1.17 ± 0.39
Liver disease	34	1.03 ± 0.32
Immunosuppression	24	1.06 ± 0.41
Acquisition
Community acquired	115	1.17 ± 0.43	0.062
Hospital acquired	135	1.29 ± 0.58
Intensive care unit	44	1.12 ± 0.41	0.233
Medical unit	124	1.22 ± 0.51
Surgical unit	53	1.33 ± 0.56
Other	29	1.28 ± 0.59
Bacteremia source			0.558
Catheter-related infection	8	1.26 ± 0.30
Respiratory tract infection	99	1.17 ± 0.44
Intra-abdominal infection	54	1.24 ± 0.53
Urinary tract infection	27	1.28 ± 0.44
Unknown or primary bacteremia	62	1.30 ± 0.65
Bacteremia outcome
Clearance after 72-h treatment	51	0.92 ± 0.21	<0.001
Persistence after 72-h treatment	165	1.33 ± 0.50

^aAge < 40 years vs. age > 65 years. All the bold values with significant difference between those groups (All p < 0.05).