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Table 2 Surgical site infections (SSI) in the study cohort

From: Efficacy of universal preoperative decolonization with Polyhexanide in primary joint arthroplasty on surgical site infections. A multicenter before-and after-study

  Control
N (SSIR)
Adherent to protocol
N (SSIR)
Intervention
N (SSIR)
Total
N (SSIR)
 
Control vs. Adherent to protocol
IRR [95%CI], p-value
Control vs. Intervention
IRR [95%CI], p-value
Overall
 Total infections 42 (0.68) 11 (0.59) 65 (0.91) 107 (0.80) 0.87 [0.42, 1.64]
0.68
1.32 [0.90, 1.96]
0.15
 Hip infections 29 (0.80) 10 (0.96) 49 (1.17) 78 (1.00) 1.22 [0.56, 2.43]
0.60
1.47 [0.94, 2.36]
0.09
 Knee infections 13 (0.52) 1 (0.12) 16 (0.53) 29 (0.53) 0.26 [0.01, 1.33]
0.12
1.02 [0.49, 2.18]
0.95
S. aureus
 Infections due to S. aureus 15 (0.24) 1 (0.05) 10 (0.14) 25 (0.19) 0.25 [0.01, 1.23]
0.10
0.57 [0.25, 1.27]
0.17
 Hip S. aureus infections 10 (0.27) 1 (0.10) 6 (0.14) 16 (0.20) 0.40 [0.02, 2.09]
0.32
0.52 [0.18, 1.45]
0.22
 Knee S. aureus infections 5 (0.20) 0 (0.00) 4 (0.13) 9 (0.16) 0 [0.00, 2.48]
0.24
0.67 [0.16, 2.63]
0.56
  1. SSIR Surgical site infection rate, Infections/100surgeries, IRR Incidence Rate Ration