| Alzheimer’s disease group (n = 25) | Dementia with Lewy bodies group (n = 11) | p-value |
Age (years, mean ± SD) | 81.6 ± 5.5 | 81.3 ± 6.2 | 0.78 |
Sex Male Female |
6 19 |
5 6 | 0.25 |
Hippocampal atrophy | 25 | 0 | <0.01 |
Decreased blood flow in arterial-spin labeling | 16 | 10 | 0.22 |
Microbleeding in susceptibility-weighted imaging | 7 | 3 | 1.00 |
Magnetic resonance angiography findings | 25 | 10 | 0.31 |
Decreased cerebral blood flow at posterior cingulate cortex and precuneus | 16 | 8 | 1.00 |
Normal cerebral blood flow at the primary sensorimotor cortex | 6 | 1 | 0.39 |
Decreased cerebral blood flow at the occipital lobe | 16 | 8 | 1.00 |
Decreased cerebral blood flow at the occipital lobe and increased blood flow at the striatum and/or thalamus | 11 | 7 | 0.47 |
Cingulate island signs | Present in 8 cases | Present in 5 cases | 0.71 |