Table 5.

Effect of weight gain on the secondary outcomes estimated by logistic regression

	At least one twin SGAa OR(95%CI)	Hypertensive gestational disorders OR(95%CI)	Gestational diabetes mellitus OR(95%CI)	Neonatal adverse outcomesb OR(95%CI)
Under vs. normal	1.01 (0.45; 2.28)	0.39 (0.15; 1.05)	1.98 (0.75; 5.22)	0.94 (0.29; 3.05)
Over vs. normal	–	7.69 (1.94; 30.47)	–	0.44 (0.05; 3.82)

The model for “neonatal adverse outcomes” was adjusted for pre-pregnancy BMI and gestational age. All the other models were adjusted only for pre-pregnancy BMI

^aSGA = small for gestational age; ^bAdverse outcomes = neonatal resuscitation, respiratory distress syndrome, disseminated intravascular coagulation, intra-ventricular hemorrhage, leucomalacia, sepsis, necrotic enteritis, retinopathy of prematurity