Risk of Second Cancers in Women After Breast Cancer
Author Information
Author(s): Raymond J S, Hogue C J R
Primary Institution: Rollins School of Public Health, Emory University
Hypothesis
Do women diagnosed with breast cancer have an increased risk of developing subsequent cancers compared to women of equal age without an initial breast cancer diagnosis?
Conclusion
Breast cancer survivors are at an increased risk for developing certain cancers in their lifetime.
Supporting Evidence
- 12.3% of breast cancer survivors were diagnosed with second primary malignant tumours.
- Women diagnosed with breast cancer before age 50 had a higher risk of developing second cancers.
- The mean time until a second cancer occurred was 6.2 years.
- Survival rates for women with multiple primary cancers were poorer compared to those with only breast cancer.
- Breast cancer survivors showed a protective effect against cervical cancer.
Takeaway
Women who have had breast cancer might get other types of cancer later on, so they need to be careful and check with doctors.
Methodology
The study analyzed data from the SEER database, comparing observed and expected cancer incidences among breast cancer survivors.
Potential Biases
Potential bias due to missing data on second tumors and variations in data quality across registries.
Limitations
The study lacked some important variables such as smoking status and specific treatment doses, which may affect the results.
Participant Demographics
The study included 335,191 women diagnosed with breast cancer between 1973 and 2000.
Statistical Information
Confidence Interval
95% CI=13.7, 21.6
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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