From: Abdominal surgical site infections: incidence and risk factors at an Iranian teaching hospital
Variable | Classification | SSI (+) | SSI (-) | total | P. Val. | |||
---|---|---|---|---|---|---|---|---|
 |  | N | % | N | % | N | % |  |
Age | Age groups under 25 | 4 | 3.7 | 103 | 96.3 | 107 | 100 | <0.001 |
 | Age groups 25–65 | 102 | 18.1 | 462 | 81.9 | 564 | 100 |  |
 | Age groups above 65 | 33 | 25.2 | 98 | 74.8 | 131 | 100 |  |
Sex | Female | 61 | 15.1 | 344 | 84.9 | 405 | 100 | <0.093 |
 | male | 78 | 19.6 | 319 | 80.4 | 397 | 100 |  |
Type Of Wounds | Clean wounds | 5 | 4.6 | 104 | 95.4 | 109 | 100 | <0.001 |
 | Clean contaminated wounds | 9 | 4.2 | 205 | 95.8 | 214 | 100 |  |
 | Contaminated wounds | 115 | 31.3 | 252 | 68.7 | 367 | 100 |  |
 | Dirty – infected wounds | 10 | 8.9 | 102 | 91.1 | 112 | 100 |  |
Type Of Operation | Urgent | 29 | 14.9 | 166 | 85.1 | 195 | 100 | <0.001 |
 | elective | 110 | 18.1 | 497 | 81.9 | 607 | 100 |  |
Operation Duration | Below 1.5 hours | 9 | 5.4 | 157 | 94.6 | 166 | 100 | <0.001 |
 | 1.5 – 4 hours | 121 | 19.5 | 501 | 80.5 | 622 | 100 |  |
 | Above 4 hours | 9 | 64.3 | 5 | 35.7 | 14 | 100 |  |
preoperative bed stay | Emergency | 24 | 11.7 | 181 | 88.3 | 205 | 100 | <0.018 |
 | 1 – 15 days | 100 | 18.6 | 439 | 81.4 | 539 | 100 |  |
 | More than 15 days | 15 | 25.9 | 43 | 74.1 | 58 | 100 |  |
Shaving Time | One hour before operation | 29 | 14.5 | 171 | 85.5 | 200 | 100 | <0.001 |
 | 12 hours before operation | 110 | 18.3 | 492 | 81.7 | 602 | 100 |  |
showering Before op. | Taken | 80 | 13.9 | 497 | 86.1 | 577 | 100 | 1.00 |
 | none | 59 | 26.2 | 166 | 76.8 | 255 | 100 |  |
Body mass index | Under 20 | 10 | 17.2 | 48 | 82.8 | 58 | 100 | 0.692 |
 | Ranging 20.1 – 25 | 73 | 16 | 383 | 84 | 456 | 100 |  |
 | Ranging 25.1 – 30 | 42 | 19.5 | 173 | 80.5 | 215 | 100 |  |
 | Above 30.1 | 14 | 19.2 | 59 | 80.8 | 73 | 100 |  |