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Area of Science:

  • Endocrinology
  • Veterinary diagnostics

Background:

  • Reference intervals (RIs) and clinical decision limits (CDLs) are crucial for interpreting endocrine biomarker values in disease diagnosis.
  • Confusion between RIs and CDLs can impact clinical decision-making.
  • Distinguishing between RIs and CDLs is essential for accurate veterinary diagnostics.

Approach:

  • This review details the application of RIs and CDLs in equine endocrinology.
  • It explains how RIs estimate an individual's health status.
  • It clarifies how CDLs identify specific disease states or risks.

Key Points:

  • RIs help determine if an individual is healthy.
  • CDLs aid in identifying disease or adverse outcomes.
  • A 'grey zone' of uncertain results exists between RIs and CDLs, avoiding binary classification.
  • This grey zone improves diagnostic accuracy by acknowledging test limitations.

Conclusions:

  • Accurate application of RIs and CDLs is vital for equine endocrine disease diagnosis.
  • Defining the 'grey zone' enhances diagnostic precision.
  • This review provides clarity on using RIs, CDLs, and grey zones in equine endocrinology.