A novel scale for suspicion of psychogenic nonepileptic seizures: development and accuracy.

Objective: The differential diagnosis between epileptic and psychogenic nonepileptic seizures (PNES) is challenging, yet suspicion of PNES is crucial to rethink treatment strategies and select patients for diagnostic confirmation through video EEG (VEEG). We developed a novel scale to prospectively suspect PNES.

Methods: First, we developed a 51-item scale in two steps, based upon literature review and panel expert opinion.