highly significantp < 0.01
Results were categorized as significant (p < 0.05), highly significant (p < 0.01), or extremely significant (p < 0.001). 2.5 DLB early predominant phenotype classification: subgroup comparison of regional changes in magnetic susceptibility and cognitive functioning, and QSM-based prediction We assessed whether the early cognitive/psychiatric phenotype and early RBD/motor phenotypes differed in sociodemographic variables (sex, age, and education), symptom duration, cognitive functioning and brain QSM patterns using ANOVA and Mann-Whitney U tests.