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. 2021 Jun 2;10(7):685–693. doi: 10.1530/EC-21-0088

Table 1.

Characteristics of subjects included in the current study.

Variables All subject GDM Non-GDM
n 2723 336 (12.3) 2387 (87.7)
Age 26.7 (3.6) 28.0 (4.3) 26.5 (3.4)
BMI 20.8 (2.8) 22.2 (3.1) 20.6 (2.7)
Gestational age
 First trimester 10.0 (2.1) 9.9 (2.0) 10.0 (2.1)
 Second trimester 25.6 (1.0) 25.6 (0.9) 25.6 (1.0)
 Third trimester 34.0 (1.0) 34.0 (1.1) 34.0 (1.0)
Multiparous 290 (10.7) 47 (14.0) 243 (10.2)
Ethnic
 Han 2682 (98.5) 329 (97.9) 2353 (98.6)
 Hui 23 (0.8) 4 (1.2) 19 (0.8)
 Other 18 (0.7) 3 (0.9) 15 (0.6)
Residence
 Urban 2134 (78.4) 272 (81.0) 1862 (78.0)
 Suburb 316 (11.6) 42 (12.5) 274 (11.5)
 Town 48 (1.7) 7 (2.1) 41 (1.7)
 Rural 226 (8.3) 15 (4.5) 210 (8.8)
Education
 Primary school or below 33 (1.2) 4 (1.2) 29 (1.2)
 Middle school 500 (18.4) 76 (22.6) 425 (17.8)
 High school 606 (22.3) 69 (20.5) 537 (22.5)
 Junior college 851 (31.3) 101 (30.1) 749 (31.4)
 Undergraduate or above 733 (26.9) 86 (25.6) 647 (27.1)
Family income per capital (Chinese Yuan)
 <1000 50 (1.8) 8 (2.4) 42 (1.8)
 1000–2500 669 (24.6) 104 (31.0) 566 (23.7)
 2500–4000 1167 (42.9) 142 (42.3) 1042 (43.7)
 >4000 837 (30.7) 82 (24.4) 755 (31.6)
Smoking
 No 2614 (96.0) 323 (96.1) 2291 (96.0)
 Yes 109 (4.0) 13 (3.9) 96 (4.0)
Drinking
 Never 2505 (92.0) 309 (92.0) 2196 (92.0)
 Occasionally 214 (7.9) 26 (7.7) 188 (7.9)
 Regularly 4 (0.1) 1 (0.3) 3 (0.1)
Fast glucose
 First trimester 4.7 (0.4) 4.8 (0.6) 4.7 (0.5)
 Second trimester 4.3 (0.5) 5.0 (0.7) 4.2 (0.5)
 Third trimester 4.2 (0.6) 4.7 (0.9) 4.2 (0.6)

Data are presented as mean (s.d.), or n (%), as applicable.