The power of our sample size was slightly above 80% to find a significant association (p < 0.05) between MOBP rs616147 and ALS, given a minor (A) allele frequency of 32% [32], a disease prevalence of 5/100,000 [2], and an estimated relative risk of 1.60. The gene discussed is MOBP; the disease is amyotrophic lateral sclerosis.