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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

From: Preterm birth and future risk of maternal cardiovascular disease – is the association independent of smoking during pregnancy?

  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
  1. Multivariate 1: Preterm birth adjusted for maternal age at delivery, country of birth, socioeconomic status, number of births, SGA, pregestational and gestational diabetes
  2. Multivariate 2: Variables in Multivariate 1 + maternal smoking during pregnancy