Table 4.

Subgroup analysis of mean placental volume and vascularization indices in cases with early onset preeclampsia (delivered under 34 weeks) and those with both preeclampsia and small for gestational age (SGA).

	Affected (mean± SD)	Normal	p-value
Preeclampsia delivered <34 weeks (n=6)
Placental Volume	40.1±24.0	45.2±18.8	0.62
VI	11.6±7.9	16.0±10.1	0.23
FI	39.8±11.6	43.4±9.0	0.48
VFI	5.2±4.5	7.4±5.6	0.62
Preeclampsia and SGA (n=6)
Placental Volume	46.7±10.7	45.7 ±18.7	0.83
VI	15.1±10.2	16.2±10.2	0.81
FI	33.6±5.8	43.2±8.9	<.01
VFI	5.3±3.9	7.4±5.6	0.25

VI= vascularization index; FI= flow index; vfi=vascularization flow index; SD =standard deviation