Table 2.

Generalized linear model for the evaluation of factors that influence the discrepancy between estimated fetal weight and actual birth weight (in g), n = 291

Coefficient	Estimate	Standard deviation (estimate)	t value	p
Intercept	33.925	66.621	0.509	0.611
Estimated fetal weight using Hadlock’s formula (g)	0.920	0.027	33.501	< 0.001*
Maternal age (years)	− 2.783	1.610	− 1.729	0.085
Parity (n)	− 3.344	14.623	− 0.229	0.819
Chorionicity: 3 (versus 1 and 2)	7.228	9.292	0.778	0.437
Presence of gestational diabetes mellitus	29.361	21.618	1.358	0.176
Gestational age at delivery ≥ 28 completed weeks (versus ≤ 27 completed weeks)	75.653	37.554	2.014	0.045*
Fetal sex: female (versus male)	− 50.473	17.794	− 2.837	0.005*
Time interval between sonographic fetal weight estimation and delivery	19.521	2.192	8.905	< 0.001*

Multiple R² = 0.927, adjusted R² = 0.924

*Significant results are presented in italic type