Birth Outcomes in Women Treated for Breast Cancer
Author Information
Author(s): Kristina Dalberg, Johan Eriksson, Lars Holmberg
Primary Institution: Uppsala University Hospital, Uppsala, Sweden
Hypothesis
The study hypothesized that no difference would be detected in birth outcomes between women previously treated for breast cancer and the general population.
Conclusion
Most births from women previously treated for breast cancer were without adverse events, but these pregnancies may require increased surveillance and management.
Supporting Evidence
- The majority of births from women previously treated for breast cancer had no adverse events.
- There was an increased risk of delivery complications and cesarean sections among women with a history of breast cancer.
- A slight increase in very preterm births and low birth weight was observed in infants born to these women.
- A tendency towards an increased risk of malformations was noted, especially in later birth years.
Takeaway
Women who had breast cancer and then had babies mostly had healthy births, but they might need extra check-ups during pregnancy.
Methodology
The study analyzed 2,870,932 singleton births from the Swedish Medical Birth Registry and linked it with the Swedish Cancer Registry to identify births after breast cancer treatment.
Potential Biases
There is a risk of misclassification of outcome variables due to changes in diagnostic coding over the study period.
Limitations
The study lacked information on the type of breast cancer treatment received and potential confounding factors like antidepressant use.
Participant Demographics
Women previously treated for breast cancer were older at delivery (mean age 34) compared to the general population (mean age 27).
Statistical Information
Confidence Interval
95% CI 1.2–1.9 for delivery complications; 95% CI 1.0–1.7 for cesarean section; 95% CI 1.7–6.0 for very preterm birth; 95% CI 1.4–5.8 for low birth weight; 95% CI 1.2–3.7 for malformations.
Digital Object Identifier (DOI)
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