Prevention

Surgical complications are more likely with 

• increasing age ^b
• female sex ^b
• non-elective admission ^b

Why?

Increasing age, female sex or a non-elective admission increase the risk of surgical complications

Patient	Prognostic Factor	Outcome	CER	OR (95% CI)	NNF+ (95% CI)
undergoing carotid endarterectomy b	female independent	stroke or death at 30 days	8.6%	1.44 (1.14 to 1.83)	30 (16 to 92)
undergoing carotid endarterectomy	age (>75 vs <74 years) independent	stroke or death at 30 days	8.6%	1.36 (1.09 to 1.71)	36 (19 to 140)
undergoing carotid endarterectomy b	non-elective admission independent	death at uncertain duration	1.2%	2.43	60