. Author manuscript; available in PMC: 2020 Mar 9.

Published in final edited form as: J Matern Fetal Neonatal Med. 2008 Jan;21(1):25–40. doi: 10.1080/14767050701832833

Table V.

Multiple linear regression (step-wise) model for the identification of plasma concentration of log (sVEGFR-1 + 1)

	R2	Beta (standardized)	p

Variables in the final model
Disease category^α	0.512	0.6	<0.001^*
Doppler abnormality^β	0.022	0.3	0.001
GA at blood sampling (weeks)	0.024	0.2	0.001^*
Total	0.54		<0.001^*
Excluded variables
Duration of sample storage (days)
Nulliparity (Yes/No)

^α

Disease category: [Normal pregnancy=0; SGA=1 and Preeclampsia =2]

^β

Doppler abnormality: [Normal pregnancy and Normal both uterine and umbilical artery Doppler =1; Abnormal uterine artery Doppler alone=2; Abnormal umbilical artery Doppler alone=3; and Abnormal both uterine and umbilical artery Doppler =4]

p < 0.05.