Month of Diagnosis and Breast Cancer Prognosis
Author Information
Author(s): H. Joensuu, S. Toikkanen
Primary Institution: Turku University Central Hospital
Hypothesis
Does the month of diagnosis affect the prognosis of breast cancer?
Conclusion
Breast cancer diagnosed in certain months has a poorer prognosis compared to others.
Supporting Evidence
- Mortality in breast cancer was greater if diagnosed in January, February, or August to October in 1945-65.
- Survival was significantly inferior among both premenopausal and postmenopausal women diagnosed in July to September in 1980-84.
- Cancers diagnosed during unfavourable months had more extensive tumour necrosis and larger primary tumour size.
Takeaway
When women find out they have breast cancer in certain months, they might not do as well as those diagnosed in other months.
Methodology
The study analyzed survival rates of breast cancer patients diagnosed in different months over two time periods.
Potential Biases
Potential biases in patient follow-up and diagnosis timing.
Limitations
The study may not account for all confounding factors affecting prognosis.
Participant Demographics
Female patients with unilateral invasive breast cancer from Turku, Finland.
Statistical Information
P-Value
0.009
Statistical Significance
p<0.05
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