Fig. 3. Survival estimates according to different variables. According to (A) gender, (B) onset age, (C) onset symptom, and (D) time from onset to diagnosis. Patients with amyotrophic lateral sclerosis showed a lower cumulative survival probability among those who were males, whose onset age was more than 65 years, who presented with bulbar symptoms at the onset period, and in whom the time from symptom onset to diagnosis was shorter than 12 months.