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Table 3 Univariate analysis of patient risk groups

From: Antimicrobial stewardship measures in cardiac surgery and its impact on surgical site infections

Infections SSI p DSWI p
Age (% within subgroup)     
 ≥ 80a 3 (2.9) 0.668 2 (1.9) 0.898
 < 80a 34 (3.7)   16 (1.7)  
Sex (%)     
 M 25 (3,2) 0.221 12 (1.5) 0.350
 F 12 (4.9)   6 (2.4)  
BMI (%)     
 ≥ 30 kg/m2 16 (4.7) 0.179 9 (2.6) 0.123
 < 30 kg/m2 21 (3.0)   9 (1.3)  
CRP (%)     
 ≥ 1 mg/dL 12 (7.4) 0.005 6 (3.7) 0.040
 < 1 mg/dL 25 (2.9)   12 (1.4)  
COPD (%)     
 Yes 5 (5.3) 0.348 3 (3,2) 0.264
 No 32 (3.4)   15 (1.5)  
Diabetes mellitus (%)     
 Yes 15 (4.6) 0.227 7 (2.2) 0.495
 No 22 (3.1)   11 (1.6)  
Nicotine abuse (%)     
 Yes 15 (4.3) 0.357 6 (1.7) 0.986
 No 22 (3.2)   12 (1.8)  
Myocardial infarction within the past half year (%)     
 Yes 12 (5.1) 0.152 8 (3.4) 0.027
 No 25 (3.1)   10 (1.3)  
Ejection fraction < 30% (%)     
 Yes 2 (4.2) 0.828 1 (2.1) 0.857
 No 35 (3.6)   17 (1.7)  
Renal failure (%)     
 Yes 12 (6.4) 0.023 7 (3.7) 0.022
 No 25 (3.0)   11 (1.3)  
Emergency (%)     
 Yes 5 (3.1) 0.704 3 (1.9) 0.914
 No 32 (3.7)   15 (1.7)  
Revision surgery (%)     
 Yes 23 (29.5) 0.000 18 (23.1) 0.000
 No 14 (1.5)   0 (0.0)  
Transfusions (%)     
 ≥ 5 14 (11.8) 0.000 10 (8.4) 0.000
 < 5 23 (2.5)   8 (0.9)  
Duration of intubation (%)     
 ≥ 24 h 9 (5.7) 0.118 6 (3.8) 0.031
 < 24 h 28 (3.2)   12 (1.4)