Table 2.

Logistic regression analyses in prediction of small for gestational age (SGA) delivered at term by estimated fetal weight (EFW) trajectory, EFW velocity, and EFW z-scores at each scan

Variables	Univariable		Multivariable
	Crude OR (95% CI)	P-value	Adjusted ORa (95% CI)	P-value
Growth trajectory group
Average-stable	Reference	-	Reference	-
Very low-stable	36.16 (18.69, 76.04)	< 0.001	34.38 (17.67,72.59)	< 0.001
Low-stable	5.83 (3.22, 11.68)	< 0.001	5.67 (3.12,11.38)	< 0.001
Rising-falling	1.32e- 6 (3.82e- 80, 1.25e- 16)	0.975	1.37e- 6 (4.95e- 80,1.25e- 29)	0.974
Growth velocity
Growth velocity1	0.11 (0.04,0.36)	< 0.001	0.13 (0.04,0.41)	< 0.001
Growth velocity2	0.14 (0.05,0.41)	< 0.001	0.15 (0.05,0.45)	< 0.001
Growth velocity3	1.47e- 4(1.25e- 5,1.63e- 3)	< 0.001	2.17e- 4(1.76e- 5,2.54e- 3)	< 0.001
EFW z-scores
EFW z-scores of 23–24 weeks	0.47 (0.39,0.56)	< 0.001	0.46 (0.38,0.56)	< 0.001
EFW z-scores of 31–32 weeks	0.38 (0.31,0.46)	< 0.001	0.39 (0.32,0.47)	< 0.001
EFW z-scores of 37–39 weeks	0.16 (0.12,0.21)	< 0.001	0.16 (0.12,0.21)	< 0.001

Growth velocity₁, growth velocity between 23–24 to 31–32 weeks of gestation

Growth velocity₂, growth velocity between 31–32 to 37–39 weeks of gestation

Growth velocity₃, growth velocity between 23–34 to 37–39 weeks of gestation

CI Confidence Interval

^aModels were adjusted for maternal age, pre-pregnancy BMI, maternal marriage status, monthly income, education level, employment status, smoking and alcohol intake before pregnancy and maternal medical history