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Related Experiment Videos

Trends and variability in survival from osteosarcoma.

W F Taylor, J C Ivins, D C Dahlin

    Mayo Clinic Proceedings
    |November 1, 1978
    PubMed
    Summary

    Survival rates for osteosarcoma patients improved significantly over time at one institution. This highlights the need for concurrent controls in clinical trials to validate treatment efficacy.

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    Area of Science:

    • Oncology
    • Surgical Oncology
    • Clinical Trials

    Background:

    • Primary osteosarcoma traditionally has poor patient survival rates, with 3-year survival often between 20-25%.
    • Previous studies reported consistently low survival percentages for patients undergoing traditional surgical management.

    Purpose of the Study:

    • To investigate a notable increase in 3-year survival rates observed in osteosarcoma patients at the Mayo Clinic.
    • To evaluate the validity of findings from studies lacking concurrent, randomly selected controls.

    Main Methods:

    • Retrospective analysis of primary osteosarcoma patient data from the Mayo Clinic (1963-1974).
    • Comparison of survival rates during different periods within the study timeframe.
    • Assessment of potential contributing factors, excluding adjuvant therapies or changes in patient demographics.

    Main Results:

    • Initial survival rates (1963-1974) were approximately 25%, aligning with existing literature.
    • A significant improvement in 3-year survival to 50% was observed in patients treated between 1972 and mid-1974.
    • This improvement occurred without changes in adjuvant treatment or patient population characteristics.

    Conclusions:

    • The observed survival improvement suggests potential biases in historical control group comparisons.
    • Findings question the reliability of adjuvant therapy trial results that depend solely on historical controls.
    • Emphasizes the critical importance of concurrent, randomized controls for accurate clinical trial outcome assessment in osteosarcoma treatment.

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