Pregnancy Length and Breast Cancer Risk
Author Information
Author(s): L J Vatten, P R Romundstad, D Trichopoulos, R Skjærven
Primary Institution: The Norwegian University of Science and Technology
Hypothesis
Does the protective effect of pregnancy against breast cancer depend on the length of gestation?
Conclusion
Longer pregnancies are associated with a lower risk of breast cancer.
Supporting Evidence
- Pregnancies generally convey protection against breast cancer.
- Shorter pregnancies are associated with a higher risk of breast cancer.
- The study used data from two established national registries.
Takeaway
Having a baby can help protect against breast cancer, and the longer the pregnancy lasts, the better the protection.
Methodology
The study linked data from two national health registries to analyze breast cancer risk based on pregnancy length.
Potential Biases
Unlikely selection or information bias due to the use of reliable national registries.
Limitations
The study may not account for all potential confounding factors.
Participant Demographics
Parous women in Norway who had their first pregnancy recorded between 1967 and 1998.
Statistical Information
P-Value
0.02
Confidence Interval
−3% to 53%
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
Want to read the original?
Access the complete publication on the publisher's website