Table 4.

Hazard ratio of early intraoperative hypotension (2–12 min), time to hypotension survival analysis

Definition	Hazard ratio	95% CI	p-value
	CFT vs. USP as reference
MAP < 65 mmHg	2.10	1.00 to 4.42	0.0387*
MAP < 65 and/or > 30% decrease	2.16	1.22 to 3.82	0.0023*

CFT conventional fluid therapy, MAP mean arterial pressure, USP ultrasound-based protocol