Fig. 3.
Association of prevalence of active seizures and disease duration in patients with Alzheimer’s disease dementia. Logistic regression with disease duration squared transformed and standardized as explanatory variable (Quadratic equation: logit{P(“having a seizure”|disease duration = d)} = − 3.56 + 0.44 × (d−md/sdd)2 with md = 72.7 and sdd = 35.0 being the mean and the standard deviation over all disease durations). The effect of disease duration on seizure prevalence was highly significant in patients with AD dementia (OR = 1.55, 95% CI = 1.39–1.73, p < 0.001)