Prophylactic Norepinephrine Infusion Reduces Postoperative Complications and Hospitalization Time in Elderly Patients Undergoing Posterior Lumbar Spinal Fusion

Table 6

90-day postoperative complications according to Clavien-Dindo Classification System experienced by 120 patients undergoing lumbar fusion surgery.

Complication	Control group (); (%)	Norepinephrine group (); (%)	RR	95% CI	value
Grade I	15	8
Grade II	6	2
Grade III	2	1
Grade IV	1	0
Grade V	2	0
Total	26 (43.3)	11 (18.3)	2.364	1.288–4.339	0.005