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Table 2 Differences in clinical characteristics between patients with K. pneumoniae, K variicola, and K. quasipneumoniae bloodstream infections

From: Clinical characteristics in blood stream infections caused by Klebsiella pneumoniae, Klebsiella variicola, and Klebsiella quasipneumoniae: a comparative study, Japan, 2014–2017

Characteristics of patientsTotal = 106K. pneumoniae = 78K. variicola = 19K. quasipneumoniae = 9p-value
n%n%n%n%
Age, median, years74 72 81 77   
Age > 80 years29(27.4)15(19.2)11(57.9)3(33.3)<0.005*
Male sex74(69.8)53(67.9)15(78.9)6(66.7)0.68 
Comorbidities  0.0       
 Diabetes mellitus29(27.4)20(25.6)7(36.8)2(22.2)0.61 
 Malignancy45(42.5)29(37.2)9(47.4)7(77.8)<0.05*
 Liver cirrhosis11(10.4)9(11.5)2(10.5)0(0)0.87 
 Collagen disease8(7.5)8(10.3)0(0)0(0)0.36 
 Chronic kidney disease4(3.8)4(5.1)0(0)0(0)0.71 
 Pulmonary disease4(3.8)4(5.1)0(0)0(0)0.71 
 Mental disorder7(6.6)5(6.4)2(10.5)0(0)0.80 
 Immunosuppressive drug14(13.2)12(15.4)2(10.5)0(0)0.64 
 Neutropenia7(6.6)5(6.4)1(5.3)1(11.1)0.80 
Source of infection
 Pneumonia6(5.7)5(6.4)1(5.3)0(0)1.00 
 Skin and soft tissue4(3.8)4(5.1)0(0)0(0)0.70 
 Abdominal39(36.8)27(34.6)9(47.4)3(33.3)0.40 
 Urinary tract31(29.2)26(33.3)2(10.5)3(33.3)0.14 
 Liver abscess7(6.6)5(6.4)2(10.5)0(0)0.79 
Others
 Hospital-acquired infection56(52.8)41(52.6)10(52.6)5(55.6)1.00 
 Appropriate antibiotic therapy within 24 h101(95.3)75(96.2)17(89.5)9(100)0.52 
  1. *Asterisk indicates a statistical significant difference among the groups
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