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Mechanistic models are utilized in individual analysis using single-source data, but imperfections arise due to data collection errors, preventing perfect prediction of observed data. The mathematical equation involves known values (Xi), observed concentrations (Ci), measurement errors (εi), model parameters (ϕj), and the related function (ƒi) for i number of values. Different least-squares metrics quantify differences between predicted and observed values. The ordinary least...
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Physiological and compartmental models are valuable tools used in studying biological systems. These models rely on differential equations to maintain mass balance within the system, ensuring an accurate representation of the dynamic processes at play.
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Sometimes we want to see how people change over time, as in studies of human development and lifespan. When we test the same group of individuals repeatedly over an extended period of time, we are conducting longitudinal research. Longitudinal research is a research design in which data-gathering is administered repeatedly over an extended period of time. For example, we may survey a group of individuals about their dietary habits at age 20, retest them a decade later at age 30, and then again...
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The interval estimate of any variable is known as the prediction interval. It helps decide if a point estimate is dependable.
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Reply to: Personalized reference intervals based on biological variation: a critical evaluation of strengths and limitations.

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The conventional reference interval model: a historical framework?

Werner Wosniok1, Rainer Haeckel2

  • 1Department of Statistics, Faculty 3 - Mathematics and Computer Science, University of Bremen, Bremen, Germany.

Clinical Chemistry and Laboratory Medicine
|March 2, 2026
PubMed
Summary

No abstract available in PubMed .

Keywords:
personalized reference intervalpopulation reference interval

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