TABLE 4.

Fixed effects in the prediction of mean uterine artery pulsatility index

Fixed part	Estimate	SE	P
Intercept	3.870	0.098	<0.001
Gestational age (weeks)	−0.210	0.008	<0.001
Gestational age (weeks)2	0.003	0.000	<0.001
Tobacco	−0.219	0.170	0.196
Cannabis	−0.197	0.116	0.091
Interaction between GA and tobacco	0.007	0.006	0.186
Interaction between GA and cannabis	0.009	0.004	0.015