Demographic and clinical features in all groups.

Values are expressed as mean ± standard deviation (SD);
athe p-values were calculated using the one-way ANOVA; Tukey’s HSD post-hoc test was also perfomed when F-test was significant;
bmain interaction among groups: F = 0.007, df = (2,47), p = 0.993;
cthe p-values were calculated using chi-squared test: χ2 = 0.553, df = 2, p = 0.758;
dthe p-values were calculated using the independent-samples t-test: t = −0.565, df = 31, p = 0.576;
eF = 0.007, df = (2,46), p = 0.762;
fmain interaction among groups: F = 2581.393, df = (2,47), p<0.001; post-hoc: controls vs. AD, p<0.001; controls vs. DLB, p<0.001 and AD vs. DLB, p = 0.762;
gmain interaction among groups: F = 1116.212, df = (2,47), p<0.001; post-hoc: controls vs. AD, p<0.001; controls vs. DLB, p<0.001 and AD vs. DLB, p = 0.917;
hmain interaction among groups: F = 2956.939, df = (2,47), p<; post-hoc: controls vs. AD, p<; controls vs. DLB, p< and AD vs. DLB, p = 0.967;
ithe p-values were calculated using the independent-samples t-test: t = −0.813, df = 31, p = 0.423.
Abbreviations: AD = Alzheimer’s Disease; CAF = Clinician Assessment of Fluctuations; DLB = dementia with Lewy bodies; DRS = Dementia Rating Scale; FAB = Frontal Assessment Battery; MMSE = Mini Mental State Examination; N/A = not applicable; NPI = Neuropsychiatric Inventory; RBD = REM Sleep Behaviour Disorder; qEEG = quantitative electroencephalogram; UPDRS = Unified Parkinson’s Disease Rating Scale; VH = visual hallucinations.