a negative trendp = 0.060
When stratified for diagnostic groups, a moderate positive correlation was observed in PDD/DLB ( ρ = 0.56, p < 0.05), while no significant correlation was observed in OND ( ρ = –0.10, p = 2.448), and a negative trend was observed in FTD ( ρ = –0.40, p = 0.060) and MCI-AD ( ρ = –0.31, p = 0.128) without reaching significance ( Fig. 4D ).