Table 5. Incidence of surgical site infections by operative region on a posterior approach.

All cases of surgical site infections were observed using a posterior operative approach. No further cases of SSI were observed after the institution of the enhanced protocol (p < 0.0001) across all regions of the spine. However, statistical significance was reached only for cervical and lumbar cases (p < 0.0042 and p < 0.0119, respectively).

	Standard Protocol		Enhanced Protocol		Total
Operative Region	Cases (% Total)	Infections (%)	Cases (% Total)	Infections (%)	Cases (% Total)	Infections (%)	P-value
Cervical	71 (29.7)	4 (5.63)	203 (29.6)	0	274 (29.7)	4 (1.46)	0.0042
Thoracic	45 (18.8)	2 (4.44)	70 (10.2)	0	115 (12.4)	2 (1.74)	0.1510
Lumbar	123 (51.5)	3 (2.44)	412 (60.2)	0	535 (57.9)	3 (0.56)	0.0119
Total	239 (100)	9 (3.77)	685 (100)	0	924 (100)	9 (0.97)	< 0.0001