Improving Prognostic Value in Breast Cancer with S-Phase Cut-Off Levels
Author Information
Author(s): H. Sigurdsson, B. Baldetorp, A. Borg, M. Dalberg, M. Fernö, D. Killander, H. Olsson, J. Ranstam
Primary Institution: Department of Oncology, University Hospital, Lund, Sweden
Hypothesis
Can optimal cut-off levels for the fraction of cells in the S-phase improve prognostic value in primary breast cancer?
Conclusion
Using two optimal cut-off points for S-phase fraction can enhance prognostic information in breast cancer patients.
Supporting Evidence
- Optimal cut-off levels for S-phase fraction were found at 7% and 12%.
- Patients with S-phase values around 2-5% had better prognosis than those with lower values.
- Multivariate analysis confirmed the independent prognostic value of the S-phase categories.
Takeaway
Doctors can better predict how breast cancer will behave by using specific cut-off points to categorize patients based on the growth phase of their cancer cells.
Methodology
The study analyzed 603 breast cancer cases using flow cytometry to determine the S-phase fraction and identified optimal cut-off levels for prognosis.
Potential Biases
Potential bias due to the exclusion of cases with high background debris and the subjective nature of categorizing S-phase values.
Limitations
The study's findings may vary due to differences in laboratory methods and the relatively short follow-up duration.
Participant Demographics
Median age of participants was 63 years, with a range from 26 to 97 years.
Statistical Information
P-Value
p<0.0001
Statistical Significance
p<0.0001
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