Relationship between prepregnancy BMI and gestational weight gain(GWG) with preeclampsia: a study based on restricted cubic spline

Table 2 Results of single-factor and multifactor logistic regressions

Variables	Single factor analysis					Multifactor analysis
Variables	β	S.E	Z	P	OR (95%CI)	β	S.E	Z	P	OR (95%CI)
Ethnic origin
Han					1.00 (Reference)					1.00 (Reference)
Hui	0.24	0.14	1.73	0.084	1.28 (0.97 ~ 1.68)	0.13	0.15	0.87	0.386	1.14 (0.85 ~ 1.51)
Other ethnic minorities	0.49	0.22	2.28	0.023	1.64 (1.07 ~ 2.50)	0.42	0.22	1.89	0.059	1.53 (0.98 ~ 2.37)
Uyghur	0.89	0.16	5.67	<0.001	2.42 (1.78 ~ 3.29)	0.76	0.16	4.61	<0.001	2.14 (1.55 ~ 2.96)
Assisted reproductive technology
no					1.00 (Reference)					1.00 (Reference)
yes	0.81	0.23	3.58	<0.001	2.26 (1.45 ~ 3.53)	0.75	0.24	3.17	0.002	2.12 (1.33 ~ 3.37)
Primigravida
no					1.00 (Reference)					1.00 (Reference)
yes	0.53	0.10	5.15	<0.001	1.70 (1.39 ~ 2.08)	0.65	0.11	6.08	<0.001	1.92 (1.55 ~ 2.36)
Prepregnancy BMI
Normal					1.00 (Reference)					1.00 (Reference)
Underweight	-0.52	0.20	-2.52	0.012	0.60 (0.40 ~ 0.89)	-0.21	0.22	-0.97	0.333	0.81 (0.53 ~ 1.24)
Overweight	0.88	0.11	8.31	<0.001	2.41 (1.96 ~ 2.96)	0.52	0.13	3.91	<0.001	1.68 (1.30 ~ 2.18)
Obesity	1.87	0.11	16.37	<0.001	6.51 (5.20 ~ 8.15)	1.15	0.21	5.41	<0.001	3.16 (2.08 ~ 4.79)
Prepregnancy weight	0.06	0.00	18.12	<0.001	1.07 (1.06 ~ 1.07)	0.04	0.01	5.96	<0.001	1.04 (1.03 ~ 1.05)
GWG	0.04	0.01	4.62	<0.001	1.04 (1.02 ~ 1.06)	0.06	0.01	7.92	<0.001	1.07 (1.05 ~ 1.08)

OR: Odds Ratio, CI: Confidence Interval
Adjusted for ethnicity, ART, primiparity, cesarean delivery, prepregnancy BMI, and GWG

ISSN: 1471-2393