Table 3 Random forest variable importance of prediction model.

Rank	MDD	Importance	CDD	Importance	NDD	Importance
1	SES	0.4115	SES	0.3771	Age	0.3999
2	Age	0.3859	Age	0.3219	SES	0.3902
3	Cesarean delivery	0.0409	Sex	0.1044	Sex	0.0441
4	Antidepressant	0.022	Cesarean delivery	0.0351	Cesarean delivery	0.0239
5	Pregestational depression	0.018	Pregestational anxiety	0.029	Antidepressant	0.0181
6	Pregestational anxiety	0.0157	Antidepressant	0.023	Pregestational anxiety	0.0172
7	Sex	0.0154	Pregestational DM	0.0139	Pregestational DM	0.0147
8	Pregestational DM	0.0149	Pregestational depression	0.0113	Pregestational depression	0.0117
9	Pregestational HTN	0.0123	Pregestational HTN	0.0095	Pregestational HTN	0.009
10	Postpartum Depression	0.0101	PIH	0.0082	PIH	0.0088
11	PIH	0.0098	Postpartum Depression	0.0081	Postpartum Depression	0.0086
12	GDM	0.0056	GDM	0.0072	GDM	0.0054
13	Thyroid disease	0.0055	FGR	0.0062	FGR	0.0047
14	FGR	0.0045	PTB	0.0044	PTB	0.0038
15	PTB	0.0039	Placenta abruptio	0.0037	Thyroid disease	0.0031
16	SGA	0.003	PPROM	0.0035	Placenta abruptio	0.003
17	Placenta abruptio	0.0028	SGA	0.0033	PROM	0.003
18	PPROM	0.0027	Thyroid disease	0.0027	SGA	0.0028
19	LGA	0.0026	LGA	0.0019	LGA	0.0022

SES, social economic status; HTN, hypertension; DM. diabetes; PTB, preterm birth; LGA, large for gestational age; SGA, small for gestational age; FGR, fetal growth restriction; PROM, premature rupture of membrane; GDM, gestational diabetes; PIH, pregnancy induced hypertension.

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