|
Model 1
|
Model 2
|
Model 3
|
---|
|
HR
|
95 % CI
|
HR
|
95 % CI
|
HR
|
95 % CI
|
---|
Index birth from 2001
| | | | | | | | | |
Any preterm birth
|
2.13
|
1.82
|
2.49
|
1.80
|
1.53
|
2.12
|
1.66
|
1.41
|
1.96
|
Smoking before last pregnancy
|
1.97
|
1.57
|
2.47
| | | |
1.46
|
1.16
|
1.85
|
Smoking during last pregnancy
|
2.62
|
2.31
|
2.97
| | | |
2.19
|
1.91
|
2.51
|
Women ≥ 35 years of age only
| | | | | | | | | |
Any preterm birth
|
1.94
|
1.74
|
2.10
|
1.70
|
1.52
|
1.90
|
1.59
|
1.43
|
1.77
|
Smoking before last pregnancy
|
1.91
|
1.61
|
2.68
| | | |
1.53
|
1.29
|
1.83
|
Smoking during last pregnancy
|
2.25
|
2.09
|
3.03
| | | |
2.07
|
1.91
|
2.23
|
- Multivariate 1: Preterm birth adjusted for maternal age at delivery, country of birth, socioeconomic status, number of births, SGA, pregestational and gestational diabetes
- Multivariate 2: Variables in Multivariate 1 + maternal smoking during pregnancy