Pre-eclampsia in Pregnancy and Breast Cancer Risk
Author Information
Author(s): L J Vatten, P R Romundstad, D Trichopoulos, R Skjærven
Primary Institution: Norwegian University of Science and Technology
Hypothesis
Does pre-eclampsia or hypertension during pregnancy reduce the risk of breast cancer later in life?
Conclusion
Women who experienced pre-eclampsia or hypertension during their first pregnancy had a 19% lower risk of developing breast cancer compared to other women.
Supporting Evidence
- The study followed 694,657 women from their first birth until cancer diagnosis or end of follow-up.
- 5474 cases of breast cancer were diagnosed during the study period.
- Women with pre-eclampsia had a 19% lower risk of breast cancer compared to other parous women.
Takeaway
If a mom has high blood pressure during pregnancy, she might be less likely to get breast cancer later.
Methodology
The study linked data from the Norwegian Medical Birth Registry and the Norwegian Cancer Registry to analyze breast cancer risk in women with pre-eclampsia or hypertension during their first pregnancy.
Potential Biases
The prospective nature of the study reduces the likelihood of selection or information bias.
Limitations
The study focused only on the first pregnancy, which may underestimate the protective effect of pre-eclampsia in subsequent pregnancies.
Participant Demographics
The study included 694,657 women who had their first birth recorded in Norway between 1967 and 1998.
Statistical Information
P-Value
0.81
Confidence Interval
95% CI: 0.71 to 0.91
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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