Early recognition and response to increases in surgical site infections using optimized statistical process control charts—the Early 2RIS Trial: a multicenter cluster randomized controlled trial with stepped wedge design

Table 1 Procedures included in each cluster

Cluster	Procedure
Cardiac	Coronary artery bypass graft
Cardiac	Cardiac valve replacement
GI	Colon
GI	Herniorrhaphy
Joint	Knee arthroplasty
Joint	Hip arthroplasty
OB-GYN	Cesarean section
	Hysterectomy
	Vaginal hysterectomy
Spine	Spinal fusion
Spine	Laminectomy
Vascular	Carotid endarterectomy
Vascular	Peripheral venous bypass

ISSN: 1745-6215