A retrospective cohort study of factors relating to the longitudinal change in birth weight

Table 4 Estimated change in newborn ponderal index by relevant maternal and newborn factors

--	r	Parameter Estimate	Standard Error	T-Statistic	P Value
Gestational Age (weeks)	0.046	0.013	0.001	9.27	<0.0001
BMI (kg/m²)	0.111	0.006	0	22.35	<0.0001
African American Race	−0.039	−0.028	0.003	−8.06	<0.0001
Male Sex	−0.041	−0.028	0.003	−8.56	<0.0001
Smoking	−0.013	−0.011	0.004	−2.73	0.006
Parity	0.109	0.077	0.003	22.43	<0.0001
Diabetes	0.044	0.073	0.008	8.94	<0.0001
Hypertension	−0.012	−0.022	0.009	−2.40	0.02
Year (per one year change)	0.114	0.009	0	23.44	<0.0001

Results from multiple regression model. Multivariate model adjusted R² = 0.05; BMI body mass index