From: Maternal exposure to ambient fine particulate matter and fetal growth in Shanghai, China
Characteristics | N (%) |
---|---|
Maternal age (years) | |
22–28 | 2783 (34.9) |
29–35 | 4516 (56.7) |
> 35 | 666 (8.36) |
Registered residence (missing = 1) | |
Permanent | 4755 (59.7) |
Migrant | 3209 (40.3) |
Parity (missing = 1) | |
1 | 6405 (80.4) |
2 | 1559 (19.6) |
Gravidity (missing = 6) | |
1 | 5076 (63. 8) |
≥ 2 | 2883 (36.2) |
SMIa (missing = 28) | |
No | 2448 (30.8) |
Yes | 5489 (69.2) |
GHb | |
No | 7567 (95.0) |
Yes | 398 (5.0) |
GDMc | |
No | 6771 (85.0) |
Yes | 1194 (15.0) |
BMI (pre-pregnancy) | |
Under weight | 573 (7.2) |
Normal weight | 6129 (77.0) |
Overweight | 1062 (13.3) |
Obesity | 201 (2.5) |
Height (mean ± sd)/cm | 161.67 ± 4.44 |
Weight (pre-pregnancy) (mean ± sd)/kg | 57.11 ± 11.99 |
Newborn gender | |
Male | 4045 (50. 8) |
Female | 3920 (49.2) |
Season of conception | |
Spring | 2216 (27.8) |
Summer | 1839 (23.1) |
Autumn | 1756 (22.1) |
Winter | 2154 (27.0) |
PTBd | |
No | 7586 (95.2) |
Yes | 379 (4.8) |
LBWe | |
No | 7732 (97.1) |
Yes | 233 (2.9) |