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Updated: Aug 5, 2026

Assessment and Evaluation of the High Risk Neonate: The NICU Network Neurobehavioral Scale
Published on: August 25, 2014
Neonatal and infancy time scale for extension into childhood and adulthood
M H Paul1, M L Kardatzke, G D Lapin
1Division of Cardiology, Willis J. Potts Children's Heart Center, Children's Memorial Hospital, Chicago, IL 60614.
Insights
This study introduces a logarithmic time scale for visualizing clinical data across neonatal periods, infancy, childhood, and adulthood. This unified scale improves the representation of early life events compared to traditional linear scales.
Area of Science:
- Biomedical Informatics
- Clinical Data Visualization
- Chronobiology
Background:
- Linear time scales obscure early neonatal and infancy events.
- Split time scales lack unification and can be arbitrary.
- A unified scale is needed to represent clinical events across the lifespan.
Purpose of the Study:
- To present a logarithmic time scale for unified exposition of clinical events.
- To improve the visualization of early life events in a lifespan context.
- To offer a method for creating a comprehensible logarithmic time scale for clinical data.
Main Methods:
- Clinical events are converted to a common unit (e.g., days).
- A logarithmic time scale (base 2, labeled in days) is plotted.
- Conventional calendar intervals (weeks, months, years) and data points are established on the logarithmic scale.
Main Results:
- A unified logarithmic time scale preserves time proportions while highlighting early life events.
- This scale avoids the crowding and obscurity of linear scales.
- A simple equation is provided for generating scale markers and data points.
Conclusions:
- The logarithmic time scale offers a superior method for visualizing clinical data across extended periods.
- It enhances the representation of critical early developmental and clinical milestones.
- This approach provides a visually comprehensible and unified framework for lifespan data analysis.
Abstract:
A logarithmic time scale is presented for exposition of clinical events and related data on a unified scale extending from neonatal time into childhood and adulthood. Such a scale preserves time scale proportions but has the advantage for certain applications of featuring early neonatal and infancy events. This type of time base avoids the disadvantages of a crowded and obscured linear scale or an arbitrary and non-unified split time scale. For clinical application all timed events are initially converted to a common unit such as days. A visually comprehensible logarithmic time scale can be derived by plotting the logarithmic scale (labeled in days, base 2) and then establishing conventional calendar interval marks (weeks, months, years) and the data plot points. A simple equation is presented for establishing the time scale graph markers and the plot data points for a logarithmic time scale of any scale axis length.
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