Table 3.

Correlates of birth weight by stepwise regression analysis

Variable*	Slope	r value†	P value
Mother’s age at parturition	12.7 g/year	0.10	<0.04
Mother’s systolic blood pressure	−3.03 g/mm Hg	−0.12	<0.01

^*Variables that were not significant were paternal systolic and diastolic blood pressure, maternal diastolic blood pressure, and sex of offspring.  

^†Overall, r=0.14 and F=4.6.