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Table 1 Risk factors for infection with Enterobacteriaceae resistant to third-generation cephalosporins in 151 patients

From: Dissemination of IncF-type plasmids in multiresistant CTX-M-15-producing Enterobacteriaceae isolates from surgical-site infections in Bangui, Central African Republic

  Presence (n = 65) Absence (n = 86) Univariate analysis
Crude OR p
Age (years)     
Mean 38.6 31.7   
CI 34.6–42.7 28.9–34.5 1.03 0.04
Gender, %
Female 45.9 54.1 0.79 0.48
Preoperative antibiotic prophylaxisa, %
Yes 46.3 53.7 1.27 0.48
Postoperative antibiotic prophylaxisb, %
Yes 43.6 56.4 1.27 0.48
Surgery in past 12 months, %
Yes 45.0 55.0 1.14 0.69
Hospitalization in past 12 months, %   
Yes 35.3 64.71 0.69 0.49
Altemeier wound class, %
1 42.7 57.3   0.93
2 44.4 55.6   
3–4 42.8 57.2   
American society of anesthesiologists physical status score, %
1 42.6 57.4   0.45
2 37.0 62.0   
3 66.7 33.3   
Length of operation, %
<30min 39.0 60.0   0.25
30 min–1 h 41.3 58.7   
1–2 h 46.5 53.5   
>2 h 75.0 25.0   
Type of surgery, %
Urology 50.0 50.0   0.31
Orthopaedics 51.8 48.2   
General surgery 34.6 65.4   
Gynaecology 40.0 60.0   
Delay between surgery and surgical-site infection (days), %
<15 43.8 56.2   0.83
≥15 43.0 57.0   
  1. OR, odds ratio.
  2. aAntibiotics administered ≤ 60 min before the start of surgery.
  3. bAntibiotics administered immediately after surgery.