Table 3.

Predictive factors for PIH

Predictors	Unadjusted analysis OR [95% CI]	Adjusted analysis OR [95% CI]
		Model 1	Model 2
ACV, mm/s	0.210 [0.068–0.646] **	0.275 [0.086–0.879] *	0.240 [0.067–0.866] *
MCV, mm/s	0.328 [0.171–0.628] **	0.382 [0.193–0.756] **	0.369 [0.177–0.772] **
CR, %	1.171 [1.045–1.312] **	1.175 [1.044–1.323] **	1.185 [1.043–1.346] **

* P < 0.05, ** P < 0.01. ACV Average Constriction Velocity, $ACV=\frac{BPD-MPD}{\mathit{PCT}}$, MCV Maximum Constriction Velocity and CR Constriction Ratio (%), $CR=\left(\frac{\mathit{MPD}}{\mathit{BPD}}\right)\times 100\%$  

Model 1: Adjusted for age

Model 2: Adjusted for age, sex, ASA physical status, albumin levels, BMI, and baseline MAP