We are enthusiastic about using evidence-based prognostic models in epilepsy. Let us know what you think. If a calculatur is missing or should be removed, please contact us, and we will address your request promptly.
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Most of the calculators featured here were developed by other researchers, not by us. This website provides an overview of widely used calculators and prognostic models in epilepsy, intended for demonstration purposes and to support researchers. They are not designed to guide clinical decision-making.
Below, we explain how we implemented these calculators on our website:
We analyzed scores and models from scientific studies predicting seizure or epilepsy risk. These studies provide cumulative probabilities of being seizure-free or experiencing seizures over time, often displayed in tables or graphs.
When graphical data (e.g., risk curves) were available, we used WebPlotDigitizer, a free online tool, to extract precise values for monthly intervals. This ensured consistent and accurate time-based risk calculations.
Using the Calculation Fields Plugin with the Chart.js extension in WordPress (Bluehost), we transformed this data into interactive calculator outputs that display seizure risks numerically and graphically. This makes it easier to visualize seizure-free probabilities and other risk metrics over time.
We included the “Change of Seizure in the Next Year” (COSY) metric, which estimates the likelihood of experiencing a seizure in the next year. The COSY formula is:
COSY=100×(1−(Pt+12/
Where:
Example Calculation:
Suppose the seizure-free probability is:
COSY is calculated as:
This means an individual has an 11.1% chance of experiencing a seizure in the next year if seizure-free at 12 months.
Authorities often use COSY to determine driving eligibility. The most frequently used cut-offs are:
By integrating these calculations, our tools aim to provide helpful insights, but are not meant to replace local or international guidelines.