Sociodemographic Features and the Median Survival Times (Months) of the Fatal Cases of Various Prion Diseases.

<p>Abbreviations: sCJD = sporadic Creutzfeldt-Jakob disease; fCJD = familial CJD; GSS = Gerstmann-straussler-Sheinker syndrome; FFI = fatal familial insomnia.</p>a<p>Difference in median survival time among multiple-group were tested by using Breslow (Wilcoxon) method.</p>b<p>Difference in median survival time between two groups were tested by using log-rank (Mantel-Cox) method.