Fig. 2.

Clinical variables affecting overall survival of patients with ALS. Survival curves of ALS patients grouped according to the site of disease onset (a), age group (b), gender (c), presence of comorbidities (d), weight loss (e), ODI (f), PEG (g), OGI (h), MV (i), OMVI (j), and total cholesterol at onset (k). Differences in survival between groups were estimated with the log-rank test. Kg, kilograms; mo, months; MV, mechanical ventilation; ODI, onset to diagnosis interval; OGI, onset to gastrostomy interval; OMVI, onset to mechanical ventilation interval; PEG, percutaneous endoscopic gastrostomy