IL31 and amyotrophic lateral sclerosis: Additionally, there was a positive correlation between the age at ALS diagnosis and IL-17F (r = 0.34, p = 0.006, CI (95%) = [0.09; 0.56]), IL-33 (r = 0.33, p = 0.009, CI (95%) = [0.07, 0.54]), IL-17E/IL-25 (r = 0.35, p = 0.005, CI (95%) = [0.09, 0.56]), and IL-31 (r = 0.28, p = 0.02, CI (95%) = [0.02; 0.50]).