Arrhythmias & electrophysiology

Parity, infertility, age at first birth, and risk of atrial fibrillation: data from the HUNT study

Eur J Prev CardiolPublished Prospective cohort study

Authors' conclusion

Women with four or more births, or a history of infertility, or younger age at first birth have approximately a 20% higher risk of AF among women over 45 years old.

Study context

Population
Women aged ≥45 years in the HUNT study, Norway
Participants
24,015 women
Exposure
Parity, infertility and age at first birth vs reference categories
Outcome
Verified incident AF
Follow-up
Median 12.8 years
Methodological detailspopulation-based, linked with Medical Birth Registry of Norway
  • Population-based
  • Linked with Medical Birth Registry of Norway

Main finding

As reported in the abstract

Incident AF
Hazard ratio (95% CI)
Four or more birthsvs Two birthsmultivariable-adjusted
1.21(1.05–1.39)
Infertilitymultivariable-adjusted
1.20(1.02–1.42)
Age at first birth <20 yearsvs Age at first birth 20-29 yearsamong parous women; multivariable-adjusted
1.20(1.03–1.40)
Participants who developed AF
1448 (6.0%)

Observational data: associations, not effects.

Original publication

Parity, infertility, age at first birth, and risk of atrial fibrillation: data from the HUNT study. Eur J Prev Cardiol. Published 1 July 2024. doi:10.1093/eurjpc/zwae215

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