Table 7 Association of any preterm birth with maternal cardiovascular disease in women with index birth from 2001 and women ≥ 35 years of age at the commencement of follow up

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