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Table 3 Univariable analyses of bacterial factors for a subsequent infection among patients with carbapenem-resistant Enterobacteriaceae colonization

From: Bacterial characteristics of carbapenem-resistant Enterobacteriaceae (CRE) colonized strains and their correlation with subsequent infection

Variables

No. (%) of isolates

P

OR (95%CI)

Infection group

(n = 58)

Non-infection group

(n = 161)

Species

 Klebsiella pneumoniae

47 (81.0)

86 (53.4)

<  0.001

3.726 (1.803–7.700)

 Non-Klebsiella pneumoniae

11 (19.0)

75 (46.6)

MIC of meropenem

  < 64 mg/L

11 (19.0)

104 (64.6)

<  0.001

7.796 (3.751–16.203)

  ≥ 64 mg/L

47 (81.0)

57 (35.4)

MIC of imipenem

  < 32 mg/L

14 (24.1)

128 (79.5)

<  0.001

12.190 (5.976–24.865)

  ≥ 32 mg/L

44 (75.9)

33 (20.5)

MIC of ertapenem

  < 64 mg/L

14 (24.1)

119 (73.9)

<  0.001

8.905 (4.436–17.874)

  ≥ 64 mg/L

44 (75.9)

42 (26.1)

Carbapenemase

 CP-CRE

51 (87.9)

104 (64.6)

0.001

3.993 (1.701–9.375)

 NCP-CRE

7 (12.1)

57 (35.4)

 KPC-CRE

42 (72.4)

27 (16.8)

<  0.001

13.028 (6.412–26.468)

 NKPC-CRE

16 (27.6)

134 (83.2)

Imipenem MIC & Carbapenemase

  ≥ 32 mg/L and CP-CRE

44 (75.9)

33 (20.5)

<  0.001

12.190 (5.976–24.865)

  < 32 mg/L or NCP-CRE

14 (24.1)

128 (79.5)

  ≥ 32 mg/L or CP-CRE

51 (87.9)

104 (64.6)

0.001

3.993 (1.701–9.375)

  < 32 mg/L and NCP-CRE

7 (12.1)

57 (35.4)

  ≥ 32 mg/L and KPC-CRE

40 (69.0)

24 (14.9)

<  0.001

12.685 (6.266–25.682)

  < 32 mg/L or NKPC-CRE

18 (31.0)

137 (85.1)

  ≥ 32 mg/L or KPC-CRE

46 (79.3)

38 (23.6)

<  0.001

12.408 (5.967–25.801)

  < 32 mg/L and NKPC-CRE

12 (20.7)

123 (76.4)

  1. Abbreviations: OR adjusted odds ratio; CI confidence interval; MIC minimum inhibitory concentration; CRE carbapenem-resistant Enterobacteriaceae; CP-CRE carbapenemase-producing CRE; NCP-CRE non-carbapenemase-producing CRE; KPC-CRE CRE strains producing K. pneumoniae carbapenemase; NKPC-CRE CRE strains that do not produce K. pneumoniae carbapenemase