Table 2.

Association between culture performance and surgical site infection in patients with complicated appendicitis

Variable outcome	Bivariate analysis				Multivariate analysis*
	HR	IC 95%		p value	HR	IC 95%		p value
Surgical Site Infection	0.30	0.11	0.80	0.017	0.27	0.10	0.74	0.011

^*Adjusted by type of surgery (laparoscopy or median laparotomy or Rocky Davies) and the NNIS index. Surgical site infection is defined by the Centers for Disease Control (CDC) and the National Health Care Safety Network (NHSN) as the infectious process that appears during the first 30 days after any type of surgical procedure in cases of surgery without the application of an implant of any origin (Horan TC, et al. Am J Infect Control 2008;36:313–4)