Table 5.

Additional risk on surgical site infections with every increasing CCI score (%) per orthopaedic subspecialty

Orthopaedic subspecialty	Additional risk	95% CI		p value
		Lower	Upper
Arthroplasty	0.007	−0.001	0.0016	0.926
Foot and ankle	0.088	−0.003	0.0043	0.614
Hand and upper extremity	0.039	−0.002	0.0026	0.733
Shoulder	0.006	−0.003	0.0034	0.973
Spine	−0.021	−0.003	0.0028	0.891
Sports	−0.008	−0.003	0.0026	0.954
Pediatrics	−0.261	−0.017	0.0113	0.714
Trauma	0.044	−0.002	0.0028	0.712
Oncology	−0.089	−0.003	0.0016	0.482

* N = 29,678 - only operations where infections were not present within 30 days before surgery were analyzed; CCI = Charlson Comorbidity Index.