From: Evaluation of antimicrobial prophylaxis use and rate of surgical site infection in surgical ward of Wachemo University Nigist Eleni Mohammed Memorial Hospital, Southern Ethiopia: prospective cohort study
Variables
Frequency
Percent
Previous surgery
 Yes
30
11.8
 No
225
88.2
Wound class
 Clean
144
56.5
 Clean-contaminated
111
43.5
Surgical type
 Elective
177
69.4
 Emergency
78
30.6