Demographics and characteristics. HDGECs = Huntington ́s disease gene-expansion carriers, N = Number of participants, SD = standard deviation, UHDRS-TMS = Unified Huntington ́s Disease Rating Scale – Total Motor Score, Q-Alb = cerebrospinal fluid/plasma albumin quotient, CSF % Th17.1 cells (of leucocytes) = the prevalence of T Helper 17.1 cells out of leucocytes measured in the cerebrospinal fluid, IQR = interquartile range. This evidence concerns the gene ALB and Huntington disease.