|
Variables
|
Pregnant women in their first pregnancy (n, %)
|
Pregnant women in their second pregnancy (n, %)
|
χ2/t
|
p value
|
|---|
|
Nationality
|
|
Han
|
1020 (93.2)
|
464 (92.1)
| | |
|
Minority
|
74 (6.8)
|
40 (7.9)
|
0.716
|
0.398
|
|
Maternal age (years)
| | |
2.207
|
0.027*
|
|
Single-child
|
|
Yes
|
354 (32.4)
|
103 (20.4)
| | |
|
No
|
740 (67.6)
|
401 (79.6)
|
24.016
|
0.000***
|
|
Marital status
|
|
Unmarried
|
9 (0.8)
|
3 (0.6)
| | |
|
Married
|
1078 (98.5)
|
498 (98.8)
| | |
|
Divorced or widowhood
|
7 (0.7)
|
3 (0.6)
| | |
|
Education level
|
|
Basic
|
116 (10.6)
|
81 (16.1)
| | |
|
Secondary
|
102 (9.3)
|
54 (10.7)
| | |
|
Higher
|
876 (80.1)
|
369 (73.2)
|
11.136
|
0.004**
|
|
Location
|
|
Lanzhou
|
863 (78.9)
|
389 (77.2)
| | |
|
Chongqing
|
231 (21.1)
|
115 (22.8)
|
0.589
|
0.443
|
|
Residence
|
|
Urban
|
951 (86.9)
|
444 (88.1)
| | |
|
Rural
|
143 (13.1)
|
60 (11.9)
|
0.623
|
0.515
|
|
The per capita income of the family
|
|
< 4500¥
|
450 (41.1)
|
208 (41.2)
| | |
|
4500¥ to 9000¥
|
506 (46.3)
|
214 (42.5)
| | |
|
> 9000¥
|
133 (12.6)
|
82 (16.3)
|
5.424
|
0.066
|
- *p < 0.05; **p < 0.01; ***p < 0.0001
