IBTR Risk Estimation

Estimating IBTR and Tx Benefit

$2.99 · Designed for iPad. Not verified for macOS.

This application is a tool to estimate the risk of ipsilateral breast tumor recurrence (IBTR) after breast-conserving surgery. It provides 10-year IBTR risk estimates and treatment effects, based on clinicopathological factors (age, pathological T stage, grade, margin status, lymphovascular invasion, hormone receptor status, HER2 status) and treatment options (radiation therapy, chemotherapy, endocrine therapy, anti-HER2 therapy). The application is available for both iPhone and iPad. The tool was developed using a Cox proportional hazards model from a multicenter cohort of 8,938 patients and calibrated with treatment effects from the EBCTCG meta-analysis. It is designed for use in shared decision-making between patients and clinicians, as well as for educational purposes. The development methodology was presented at the 2025 ASCO Annual Meeting (Abstract No. 575) and published in JCO Clinical Cancer Informatics (Sagara et al., 2025). For further details, please refer to the publication. Disclaimer This application is intended for educational and informational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Clinical decisions should always be made in consultation with the treating physician. The developers assume no legal responsibility for any outcomes resulting from the use of this application.

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Updated the Age Rating settings.

Version 1.5

The developer, Yasuaki Sagara, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

    The developer does not collect any data from this app.

    Privacy practices may vary, for example, based on the features you use or your age. Learn More

    Accessibility

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Information

    Seller
    • Yasuaki Sagara
    Size
    • 8.6 MB
    Category
    • Medical
    Compatibility
    Requires iOS 16.6 or later.
    • iPhone
      Requires iOS 16.6 or later.
    • iPad
      Requires iPadOS 16.6 or later.
    • Mac
      Requires macOS 13.5 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 1.0 or later.
    Languages
    • English
    Age Rating
    16+
    Copyright
    • © 2025 Yasuaki Sagara
  • Privacy Policy

    • Supports

    • Family Sharing

      Up to six family members can use this app with Family Sharing enabled.

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