Case Control Study
Copyright ©The Author(s) 2021.
World J Clin Cases. Sep 26, 2021; 9(27): 8008-8019
Published online Sep 26, 2021. doi: 10.12998/wjcc.v9.i27.8008
Table 1 General characteristics of the pregnant women who participated in this study
Characteristics
n = 3172
Percentage
Ethnicity
Han308297.2
Others 902.8
Age in yr
< 20 1063.3
20-25 31810.0
25-30 147346.4
30-35 90828.6
35-40 3019.5
≥40 662.1
Educational level
Primary school or lower190.6
Junior middle school49315.5
High school65520.7
College178456.2
Master’s degree2066.5
Doctoral degree150.5
Number of permanent residents in family
1371.2
295130.0
370622.3
472522.9
555017.3
61193.8
≥ 7682.1
Unknown160.5
Geographic distribution
East 69421.9
Middle 49815.7
West 39412.4
South 57218.0
North 101432.0
Place of residence
Urban registration134642.4
Rural registration182657.6
Clinical characteristics
Anemia44314.0
Premature rupture of membrane39812.6
Gestational diabetes mellitus37211.7
Gestational hypertension842.7
Occupation
Unemployed92929.3
Administration31910.1
Professional50415.9
Office clerk3129.8
Business services industry60719.1
Agricultural industry642.0
Others43713.8
Personal annual income (Yuan, thousands)
0 2076.5
≤ 102146.8
≤ 203089.7
≤ 3048615.3
≤ 4036211.4
≤ 5057118.0
≤ 602818.9
≤ 70822.6
≤ 801454.6
≤ 90180.6
≤ 1002959.3
≤ 150943.0
> 150732.3
Unknown361.1
Family annual income, in Yuan, thousands
0 250.8
≤ 201153.6
≤ 402066.5
≤ 6045114.2
≤ 8031710.0
≤ 10066120.8
≤ 1201444.5
≤ 140521.6
≤ 1603029.5
≤ 180682.1
≤ 20040412.7
≤ 250882.8
≤ 3001595.0
> 3001364.3
Unknown441.4
Body mass index in kg/m²
< 18.542013.2
18.5-24.0206265.0
24.0-28.055617.5
≥ 28.01344.2
Gestational weight gain in kg
< 2.5461.5
2.5-5.0 250.8
5.0-7.5 1695.3
7.5-10.0 2026.4
10.0-12.5 71722.6
12.5-15.0 47915.1
15.0-17.576024.0
17.5-20.02869.0
20.0-22.53029.5
22.5-25.0672.1
25.0-27.5832.6
≥ 27.5361.1