Table 3: Associations between polymicrobial/monomicrobial BSIs and the different risk factors and outcome.

Monomicrobial BSIsa (%)Polymicrobial BSIs (%)Odds ratio95% CIb value

Age
 <4.140 (48.2)31 (73.8)1.0c
 ≥4.143 (51.8)11 (26.2)0.330.15–0.74.007*
Diagnosis
 Oncology34 (41.0)21 (50.0)1.0c
 Transplantation22 (26.5)6 (14.3)0.440.15–1.27.13
 Gastrointestinal16 (19.3)10 (23.8)1.010.39–2.64.98
 Other11 (13.2)5 (11.9)0.740.22–2.42.61
Type of catheter
 Single lumen22 (26.5)16 (38.1)1.0c
 Double lumen38 (45.8)21 (50.0)0.760.33–1.75.52
 Venous implanted port18 (21.7)3 (7.1)0.230.06–0.91.038*
 PICCd5 (6.0)2 (4.8)0.550.09–3.20.51
Neutropenia
 No69 (83.1)34 (81.0)1.0c
 Yes14 (16.9)8 (19.0)1.160.44–3.03.76
Parenteral nutrition
 No58 (69.9)27 (64.3)1.0c
 Yes25 (30.1)15 (35.7)1.290.59–2.83.53
Recurrence
 No28 (80.0)20 (76.9)1.0c
 Yes7 (20.0)6 (23.1)1.200.35–4.11.77
Removal
 No63 (75.9)33 (78.6)1.0c
 Yes20 (24.1)9 (21.4)0.860.35–2.10.74

aBSIs: blood stream infections; b95% CI: 95% confidence interval; creference group; dPICC: peripherally inserted central catheter; *statistical significant.