Table 2.

Logistic regression of the effect of internal migrant status (Hukou) on the rate of high-risk pregnancies

Variable	Model 1		Model 2		Model 3
	Marginal effects	P-value	Marginal effects	P-value	Marginal effects	P-value
	(1)	(2)	(3)	(4)	(5)	(6)
Migrant status	0.038***	< 0.001	0.050***	< 0.001	0.060***	< 0.001
Age			–0.019***	< 0.001	–0.013***	–0.004
Age square			0.001***	< 0.001	0.001***	< 0.001
Ethnic group			–0.061***	< 0.001	–0.067***	< 0.001
Nationality			0.070**	–0.026	0.059*	–0.07
Occupation			–0.017***	–0.004	0.003	–0.676
Marriage status			0.005	–0.871	0.018	–0.579
Insurance status			–0.059***	< 0.001	–0.046***	< 0.001
Gravida					0.015***	< 0.001
Parity					0.004	–0.32
Severe pregnant					0.258***	< 0.001
Cesarean delivery					0.262***	< 0.001
Observations (N)	133,358	133,358	133,358	133,358	133,358	133,358

^* p < 0.05, ^** p < 0.01, ^*** p < 0.001