TABLE 3.

Establishment and internal validation of prediction model for pregnancy induced hypertension based on logistic linear regression analysis (n = 1,137).

Variables		B	S.E.	Wald	p	Exp (B)	95.0% CI for EXP (B)
							Lower	Upper
All the subjects	Body mass index	0.196	0.033	35.529	0	1.216	1.14	1.297
(n = 1,137)*	Serum homocysteine concentration (μmol/L)	0.157	0.05	9.824	0.002	1.17	1.061	1.291
	Serum folate concentration (mmol/L)	0.018	0.01	3.548	0.06	1.018	0.999	1.038
	Constant	−7.796	0.899	75.15	0	0
MTHFR C677TCC	Body mass index	0.182	0.054	11.408	0.001	1.2	1.079	1.333
Subgroup (n = 342)**	Serum homocysteine concentration (μmol/L)	0.294	0.096	9.329	0.002	1.342	1.111	1.621
	Serum folate concentration (mmol/L)	0.041	0.018	5.536	0.019	1.042	1.007	1.079
	Constant	−9.053	1.628	30.928	0	0
MTHFR C677T CT	Body mass index	0.164	0.052	9.771	0.002	1.178	1.063	1.306
Subgroup (n = 553)**	Serum homocysteine concentration (μmol/L)	0.085	0.088	0.934	0.334	1.089	0.916	1.293
	Serum folate concentration (mmol/L)	0.02	0.015	1.761	0.185	1.02	0.991	1.05
	Constant	−6.833	1.328	26.485	0	0.001
MTHFR C677T TT	Body mass index	0.174	0.072	5.906	0.015	1.19	1.034	1.369
Subgroup (n = 242)**	Serum homocysteine concentration (μmol/L)	0.062	0.1	0.384	0.535	1.064	0.875	1.294
	Serum folate concentration (mmol/L)	−0.014	0.021	0.458	0.499	0.986	0.947	1.027
	Constant	−5.491	1.975	7.729	0.005	0.004

*Establishment of prediction model for pregnancy induced hypertension.

**Internal validation of prediction model for pregnancy induced hypertension.