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Table 2 Adjusted Mixed Effects Logistic Regression Modela with Surgical Site Infection as the Dependent Variable

From: Antimicrobial prophylaxis administration after umbilical cord clamping in cesarean section and the risk of surgical site infection: a cohort study with 55,901 patients

  OR LL UL p
SAP administration after cord clamping (Ref = before incision) 1.140 0.956 1.360 0.144
Age group
 30–40 years (Ref = < 30 years) 0.760 0.657 0.879 < 0.001
 > 40 years (Ref = < 30 years) 0.852 0.640 1.134 0.272
Contaminated wound (Ref = clean, contaminated) 1.270 1.074 1.503 0.005
SAP agent (%)
 Cefazolin (Ref = Amoxicillin/clavulanate) 1.106 0.721 1.697 0.645
 Ceftriaxone (Ref = Amoxicillin/clavulanate) 0.939 0.544 1.619 0.821
 Cefuroxime (Ref = Amoxicillin/clavulanate) 1.031 0.687 1.547 0.882
Elective surgery (Ref = emergent) 0.574 0.488 0.676 < 0.001
ASA Score
 ASA 2 (Ref = ASA 1) 1.217 1.003 1.477 0.046
 ASA 3/4/5 (Ref = ASA 1) 1.326 0.952 1.846 0.095
Procedure duration (per 30 min increase) 1.330 1.189 1.488 < 0.001
Hospital bed size
 200–499 (Ref = < 200) 1.200 0.880 1.634 0.249
 500+ (Ref = < 200) 1.231 0.819 1.849 0.317
Procedure after Jan 2014 (Ref = before) 0.852 0.711 1.020 0.081
  1. Abbreviations
  2. ASA American Society of Anesthesiologists
  3. LL Lower limit of 95% confidence interval
  4. OR Odds Ratio
  5. SAP Surgical antimicrobial prophylaxis
  6. UL Upper limit of 95% confidence interval
  7. aComplete cases only, n = 48,995