| |
Univariate
|
Multivariate 1
|
Multivariate 2
|
|---|
| |
HR
|
95 % CI
|
HR
|
95 % CI
|
HR
|
95 % CI
|
|---|
|
CHD
| | | | | | | | | |
|
Term birth
|
Ref
| | |
Ref
| | |
Ref
| | |
|
Any preterm birth
|
2.01
|
1.75
|
2.30
|
1.73
|
1.50
|
1.99
|
1.61
|
1.39
|
1.85
|
|
Preterm birth by severity
| | | | | | | | | |
|
Late preterm birth
|
1.79
|
1.50
|
2.15
|
1.59
|
1.33
|
1.90
|
1.49
|
1.24
|
1.78
|
|
Moderately preterm birth
|
2.37
|
1.79
|
3.14
|
2.07
|
1.56
|
2.75
|
1.89
|
1.43
|
2.51
|
|
Extremely preterm birth
|
2.30
|
1.77
|
2.98
|
1.86
|
1.39
|
2.48
|
1.72
|
1.29
|
2.29
|
|
Preterm birth by onset
| | | | | | | | | |
|
Spontaneous preterm birth
|
1.78
|
1.50
|
2.10
|
1.67
|
1.41
|
1.97
|
1.53
|
1.29
|
1.81
|
|
Indicated preterm birth
|
2.53
|
2.05
|
3.13
|
1.86
|
1.48
|
2.32
|
1.77
|
1.41
|
2.21
|
|
Preterm birth by number
| | | | | | | | | |
|
1 preterm birth
|
1.88
|
1.63
|
2.17
|
1.65
|
1.43
|
1.92
|
1.54
|
1.33
|
1.79
|
|
≥2 preterm births
|
3.64
|
2.55
|
5.19
|
2.58
|
1.79
|
3.71
|
2.31
|
1.61
|
3.33
|
|
Smokinga
| | | | | | | | | |
|
Never smoking during pregnancy
|
Ref
| | | | | |
Ref
| | |
|
Smoking before last pregnancy
|
1.97
|
1.58
|
2.47
| | | |
1.49
|
1.19
|
1.87
|
|
Smoking during last pregnancy
|
2.37
|
2.16
|
2.60
| | | |
2.13
|
1.92
|
2.35
|
- 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
- a: Multivariate 2 adjusted for any preterm birth
