Table 4.

Correlations of Flow Parameters by Vessel With ROP Stage and SWZ (Stage Weighted by Zone)

		Stage		SWZ
Vessel	Parameter	R	P Value	R	P Value
CRA	Vmax	0.423	0.002	0.470	0.001
	Vmin	0.258	.071	0.269	0.059
	Vmean	0.435	0.002	0.473	0.001
CRV	Vmax	−0.375	0.008	−0.425	0.002
	Vmin	−0.399	0.004	−0.444	0.001
	Vmean	−0.389	0.006	−0.440	0.002
SPCA	Vmax	0.303	0.026	0.362	0.007
	Vmin	0.237	0.085	0.271	0.048
	Vmean	0.294	0.031	0.356	0.008

Resistance indices (RI and PI) were not significantly correlated with stage in any vessel.