Fig. 1: Characterization of subjective cognitive decline in individuals with iRBD without MCI.

a Number of affirmed questions contributing to the Multi-SubCoDE SCD-Domains score and corresponding profile of subjective cognitive decline (SCD): SCD-, no SCD; na-sd-SCD+, non-amnestic single-domain SCD; a-sd-SCD+, amnestic single-domain SCD; na-md-SCD+, non-amnestic multi-domain SCD; a-md-SCD+, amnestic multi-domain SCD; iRBD, isolated REM sleep behavior disorder; MCI, mild cognitive impairment. b Domain-wise proportion of affirmed questions contributing to the Multi-SubCoDE SCD-Domains score and corresponding indication of worries (W-, no worries; W+, mild worries; W++, severe worries) and confirmation by an informant (C-, no; C+, yes). PS, processing speed. c Subscores of the Multi-SubCoDE across HC, RBD, and RBD.MCI groups. Triangles/dots/diamonds represent individual scores, the group-wise boxplots visualize the within-group median, and the hinges represent the corresponding first and third quartile. HC, healthy controls; RBD, individuals with iRBD without MCI, i.e., with and without SCD; RBD.MCI, individuals with iRBD with MCI. ⁺p < 0.100 *p < 0.050, **p < 0.010, ***p < 0.001.