The Differences of Population Birth Defects in Epidemiology Analysis between the Rural and Urban Areas of Hunan Province in China, 2014–2018

Table 5

Factors associated with BD occurrence in the multiple logistic regression model.

Factors associated with BD occurrence		S.E	Wals	Df		aOR	aOR (95% CI)
							Limit	Up
Area of city (Ref: Shifeng district)	-0.31	0.07	23.12	1	<0.001	1.37	1.20	1.55
Gender of male (Ref: female)	0.45	0.04	107.96	1	<0.001	1.56	1.44	1.70
Pregnancy weeks (Ref: 37-42weeks)			140.06	2	<0.001
≤36 weeks	0.95	0.08	138.94	1	<0.001	2.59	2.21	3.03
≥43 weeks	1.11	1.02	1.18	1	0.277	3.05	0.41	22.68
Weight of birth (Ref: 2500-4000 g)			215.77	2	<0.001
<2500 g	1.23	0.08	214.78	1	<0.001	3.42	2.90	4.03
≥4000 g	-0.05	0.10	0.28	1	0.598	0.95	0.79	1.15
Multiple births (Ref: singletons)	-0.78	0.12	41.49	1	<0.001	0.46	0.363	0.58
Birthplace of others (Ref: hospital)	-0.45	0.06	50.89	1	<0.001	0.64	0.57	0.72
Mother place of domicile (Ref: local place)			121.13	2	<0.001
Nonlocal certificate registries but residence with 1 year	1.21	0.20	38.27	1	<0.001	3.35	2.28	4.91
Nonlocal certificate registries but residence with ≥1 year	1.43	0.15	86.68	1	<0.001	4.20	3.10	5.68
Maternal age groups (Ref: 25-29 years)			12.00	4	0.017
≤24 years	0.05	0.06	0.69	1	0.408	1.05	0.94	1.17
30-34 years	-0.09	0.05	2.78	1	0.095	0.92	0.82	1.02
35-39 years	0.09	0.07	1.36	1	0.243	1.09	0.94	1.26
≥40 years	0.28	0.13	4.89	1	0.027	1.32	1.03	1.68

^aS.E: standard error; aOR: adjusted odds ratio; CI: confidence interval; Ref: reference.