Table 2.

The Associations of Grandmaternal and Child Birth Weight and Fetal Growth in the Aberdeen Maternity and Neonatal Databank-Study 1950-2015. Pearson Correlation Coefficients, Mean Group Values And Regression Coefficients And Their 95 % Confidence Intervals From Linear Regression Analyses Where All Continuous Variables Are Expressed in Standard Deviation Units.

	Univariate analyses			Model 1a		Model 2b		Model 3c		Model 4d
Grandmaternal Birth Weight	No.	r=	P	B	95 % CI	B	95 % CI	B	95 % CI	B	95 % CI
Child Birth Weight as Measured
As Measured	1457	0.19	<0.001	0.18	0.13, 0.23	0.18	0.13, 0.23	0.12	0.07, 0.18	0.12	0.07, 0.18
Adjusted for sex and gestational age	1280	0.18	<0.001	0.17	0.11, 0.22	0.17	0.11, 0.22	0.12	0.06, 0.17	0.12	0.06, 0.17
Child Birth Weight Adjusted for sex and gestational age
As Measured	1426	0.19	<0.001	0.19	0.13, 0.24	0.18	0.13, 0.23	0.12	0.07, 0.18	0.12	0.07, 0.18
Adjusted for sex and gestational age	1252	0.18	<0.001	0.18	0.13, 0.23	0.17	0.12, 0.23	0.12	0.07, 0.17	0.12	0.06, 0.18

B=unstandardized regression coefficient; CI=Confidence Interval; r=Pearson correlation coefficient; SD=Standard deviation

^aRegression model 1 is adjusted for child sex in the grandchild’s generation, year of delivery, maternal age at delivery, socioeconomic deprivation level of the family and parity in the grandmother’s, mother’s and child’s generation.

^bModel 2 includes model 1 covariates and maternal hypertensive disorders during pregnancy, pre-existing or gestational diabetes, labour type and maternal smoking during pregnancy in grandmaternal, maternal and child’s generations.

^cModel 3 is adjusted for model 2 covariates and also for birth weight in the intermediate generation.

^dModel 4 is adjusted for model 3 covariates and maternal height, body mass index and gestation of weight measurement during pregnancy.