From: Effect of ambient air pollution on premature SGA in Changzhou city, 2013–2016: a retrospective study
Air pollutants levels a | NO. | Trimester1 | Trimester2 | Trimester3 | Whole gestation | ||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
OR b | 95% CI | OR b | 95% CI | OR b | 95% CI | OR b | 95% CI | ||||||
PM2.5 (μg/m3) | |||||||||||||
1st quartile | 677 | 1.00 | – | – | 1.00 | – | – | 1.00 | – | – | 1.00 | – | – |
2nd quartile | 677 | 1.03 | 0.76 | 1.87 | 0.83 | 0.56 | 1.34 | 1.32 | 0.80 | 2.18 | 1.05 | 0.56 | 1.64 |
3rd quartile | 677 | 1.13 | 0.87 | 2.13 | 1.28 | 0.65 | 1.67 | 1.46 | 0.87 | 2.29 | 1.41 | 0.44 | 1.15 |
4th quartile | 678 | 1.35 | 1.02 | 2.56 | 0.97 | 0.76 | 1.43 | 1.91 | 1.21 | 2.83 | 2.33 | 1.02 | 2.68 |
P for trend | 0.121 | 0.374 | 0.025 | 0.001 | |||||||||
NO2 (μg/m3) | |||||||||||||
1st quartile | 677 | 1.00 | – | – | 1.00 | – | – | 1.00 | – | – | 1.00 | – | – |
2nd quartile | 677 | 1.01 | 0.68 | 1.58 | 0.99 | 0.63 | 1.56 | 1.16 | 0.76 | 1.98 | 0.96 | 0.54 | 1.47 |
3rd quartile | 676 | 1.08 | 0.71 | 1.62 | 1.30 | 0.79 | 2.01 | 1.06 | 0.65 | 1.78 | 0.98 | 0.69 | 1.87 |
4th quartile | 679 | 0.87 | 0.53 | 1.33 | 1.36 | 0.89 | 2.31 | 1.45 | 0.91 | 2.23 | 1.06 | 0.54 | 2.92 |
P for trend | 0.436 | 0.076 | 0.165 | 0.016 | |||||||||
SO2 (μg/m3) | |||||||||||||
1st quartile | 677 | 1.00 | – | – | 1.00 | – | – | 1.00 | – | – | 1.00 | – | – |
2nd quartile | 677 | 1.17 | 0.89 | 1.83 | 1.20 | 0.77 | 1.38 | 1.01 | 0.53 | 1.17 | 0.98 | 0.89 | 1.15 |
3rd quartile | 677 | 1.05 | 0.99 | 1.11 | 1.06 | 0.89 | 1.23 | 1.24 | 0.78 | 1.32 | 1.02 | 0.82 | 1.38 |
4th quartile | 678 | 1.01 | 1.01 | 1.25 | 1.12 | 0.88 | 2.41 | 1.15 | 0.89 | 2.56 | 1.18 | 0.77 | 2.51 |
P for trend | 0.657 | 0.175 | 0.078 | 0.004 |