Surgical site infection rate in spine surgery, incidence, and risk factors: a ten-year retrospective cohort review in a developing neurosurgical centre

Table 2 Multivariate logistic regression model for predictors of SSI

variable	B	S.E	Wald	Sig	OR	95% C.I. for EXP(B)
variable	B	S.E	Wald	Sig	OR	Lower	upper
Spine segment operated	0.783	0.235	11.151	0.001*	2.189	1.382	3.467
Spinal pathology/surgical indication	− 0.367	0.323	1.289	0.256	0.693	0.368	1.305
Duration of Surgery	− 0.012	0.045	0.073	0.787	0.988	0.904	1.079
Patient ASA score	0.017	0.329	0.003	0.959	1.017	0.534	1.938
Estimated blood loss	0.000	0.001	0.006	0.937	1.000	0.999	1.001
No of blood transfused	− 0.113	0.278	0.164	0.685	0.893	0.518	1.541
LOS Before surgery	0.021	0.018	1.291	0.256	1.021	0.985	1.058

B; intercept, S.E.; standard error, Sig.; significant, OR; odds ratio, CI; confidence interval, *statistically significant, ASA; American Society of Anaesthesiologists, LOS; Length of hospital stay

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