Characteristic
|
Total
|
PTB
|
PTB
|
|
LBW
|
LBW
|
|
SGA
|
SGA
|
|
|
No
(n=5188)
|
Yes (n=224)
|
|
No (n=5059)
|
Yes (n=126)
|
|
No (n=4395)
|
Yes (n=316)
|
Agec
|
26.6±3.7 |
26.6±3.7 |
27.0±3.6 |
|
26.6±3.7 |
26.0±3.5 |
|
26.5±3.7 |
25.8±3.5 |
<25 |
2523 (31.2) |
1623 (31.3) |
65 (29.0) |
|
1574 (31.1) |
44 (34.9) |
|
1377 (31.3) |
123 (38.9) |
25~29 |
1688 (46.6) |
2420 (46.6) |
103 (46.0) |
|
2355
(46.6) |
61 (48.4) |
|
2068 (47.1) |
145 (45.9) |
≥30 |
1201 (22.2) |
1145 (22.1) |
56 (25.0) |
|
1130 (22.3) |
21 (16.7) |
|
950 (21.6) |
48 (15.2) |
Residencea
|
|
|
|
|
|
|
|
|
|
Rural |
1143 (21.1) |
4104 (79.1) |
165 (73.7) |
|
3985 (78.8) |
101
(80.2) |
|
3457 (78.7) |
256 (81.0) |
Education |
|
|
|
|
|
|
|
|
|
Senior high school or lower |
3075 (56.8) |
2954 (56.9) |
121 (54.0) |
|
2877 (56.9) |
72 (57.1) |
|
2502 (56.9) |
179 (56.6) |
Employment |
|
|
|
|
|
|
|
|
|
Unemployed |
3114 (57.5) |
2985 (57.5) |
129 (57.6) |
|
2911 (57.5) |
69 (54.8) |
|
2533 (57.6) |
166 (52.5) |
Average family income (RMB per year)c
|
|
|
|
|
|
|
|
|
|
≤49,999 |
2285 (42.2) |
2180 (42.0) |
105 (46.9) |
|
2130 (42.1) |
60
(47.6) |
|
1857 (42.3) |
155 (49.1) |
Pre-pregnancy BMI (kg/m2)c
|
|
|
|
|
|
|
|
|
|
Underweight |
973 (18.0) |
925 (17.8) |
48 (21.4) |
|
924 (18. 3) |
33
(26.2) |
|
824 (18.7) |
89 (28.2) |
Normal |
3680 (68.0) |
3541 (68. 3) |
139 (62.1) |
|
3457 (68.3) |
76
(60.3) |
|
2997 (68.2) |
197 (62.3) |
Overweight |
599 (11.1) |
567 (10.9) |
32 (14.3) |
|
533 (10.5) |
15
(11.9) |
|
451 (10.3) |
26 (8.2) |
Obese |
160 (3.0) |
155 (3.0) |
5 (2.2) |
|
145 (2.9) |
2 (1.6) |
|
123
(2.8) |
4 (1.3) |
GWGc
|
|
|
|
|
|
|
|
|
|
Appropriate |
499 (9.2) |
474 (9.1) |
25 (11.2) |
|
436 (8.6) |
10
(7.9) |
|
369 (8.4) |
14 (4.4) |
Insufficient |
4816 (89.0) |
4625 (89.1) |
191 (85.3) |
|
4542 (89.8) |
114 (90.5) |
|
3958 (90.1) |
299 (94.6) |
Excessive |
97 (1.8) |
89 (1.7) |
8 (3.6) |
|
81 (1.6) |
2 (1.6) |
|
68
(1.5) |
3 (0.9) |
Smoking |
|
|
|
|
|
|
|
|
|
Never |
5049 (93.3) |
4842 (93.3) |
207 (92.4) |
|
4720 (93.3) |
121
(96.0) |
|
4097 (93.2) |
293 (92.7) |
Former |
267 (4.9) |
252 (4.9) |
15 (6.7) |
|
248 (4.9) |
4 (3.2) |
|
218 (5.0) |
18 (5.7) |
Current |
96 (1.8) |
94 (1.8) |
2 (0.9) |
|
91 (1.8) |
1 (0.8) |
|
80
(1.8) |
5 (1.6) |
Drinking |
|
|
|
|
|
|
|
|
|
Never |
4294 (79.3) |
4120 (79.4) |
174 (77.7) |
|
4017 (79.4) |
104
(82.5) |
|
3486 (79.3) |
252 (79.7) |
Former /Current |
1118 (20.7) |
1068 (20.6) |
50 (22.3) |
|
1042 (20.6) |
22 (17.5) |
|
909 (20.7) |
64 (20.3) |
Paritybc
|
|
|
|
|
|
|
|
|
|
≥1 |
2344 (43.3) |
2258 (43.5) |
85 (37.9) |
|
2203 (43.5) |
40 (31.7) |
|
1888 (43.0) |
85 (26.9) |
HDPab
|
|
|
|
|
|
|
|
|
|
Yes |
101 (1.9) |
91 (1.8) |
10 (4.5) |
|
88 (1.7) |
6 (4.8) |
|
79
(1.8) |
7 (2.2) |
Pre-eclampsia |
|
|
|
|
|
|
|
|
|
Yes |
40 (0.7) |
37 (0.7) |
3 (1.3) |
|
37 (0.7) |
2 (1.6) |
|
30 (0.7) |
3 (0.9) |
GDMc
|
|
|
|
|
|
|
|
|
|
Yes |
369 (6.8) |
347 (6.7) |
22 (9.8) |
|
340 (6.7) |
7 (5.6) |
|
292
(6.6) |
7 (2.2) |
Physical activity during
pregnancy
|
|
|
|
|
|
|
|
|
|
Low |
1804 (33.3) |
1733 (33.4) |
71 (31.7) |
|
1687 (33.3) |
43 (34.1) |
|
1470 (33.4) |
118 (37.3) |
Medium |
1805 (33.4) |
1721 (33.2) |
84 (37.5) |
|
1679 (33.2) |
47
(37.3) |
|
1455 (33.1) |
101 (32.0) |
High |
1803 (33.3) |
1734 (33.4) |
69 (30.8) |
|
1693 (33.5) |
36
(28.6) |
|
147 (33.4) |
97 (30.7) |