Prospective validation of a seizure diary forecasting falls short.

A previously developed e-diary based AI seizure forecasting tool was prospectively tested. Although by some metrics the tool was successful, the overall AI performance was unacceptably low.It was much easier to outperform a random forecast; it was much harder to outperform a moving average forecast.Using unverified diaries can skew forecasting metrics in favor of underperforming tools.