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    Estimated/Expected Peak Expiratory Flow (Peak Flow)

    Quantifies asthma exacerbation severity.

    IMPORTANT

    This calculator includes inputs based on race, which may or may not provide better estimates, but cannot be run without inputting race due to how the formulae were developed by the CDC’s Third National Health and Nutrition Examination Survey See here for more on our approach to addressing race and bias on MDCalc.

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    Dr. John L. Hankinson
    Dr. John L. Hankinson
    About the creator
    John L. Hankinson, PhD, is a biomedical engineer and consultant. He is also the course director for a National Institute for Occupational Safety and Health approved spirometry course and serves on the ATS Proficiency Standards for Pulmonary Function Laboratories Committee. Dr. Hankinson’s primary research is focused on respiratory diseases and spirometry.
    Are you Dr. John L. Hankinson? Send us a message to review your photo and bio, and find out how to submit Creator Insights!
    MDCalc loves calculator creators – researchers who, through intelligent and often complex methods, discover tools that describe scientific facts that can then be applied in practice. These are real scientific discoveries about the nature of the human body, which can be invaluable to physicians taking care of patients.
    Content Contributors
    • Derek Tam, MD, MPH
    About the Creator
    Dr. John L. Hankinson
    Dr. John L. Hankinson
    Content Contributors
    • Derek Tam, MD, MPH