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 |