In the multiple linear regression including BMI, LDL, and diagnostic group, both BMI and ALS diagnosis remained independent predictors of ABCA1 concentration (p = 0.021 and p = 0.042, respectively), accounting for 38.1% of variance (adjusted R2 = 0.381; Figure 7H). This evidence concerns the gene ABCA1 and amyotrophic lateral sclerosis.