Figure 1.

The trias of SSBD, their interaction and impact on functionality. A hypothetical model adapted from (5). Applying a structural equation model (SEM), Samalin et al. (5) demonstrated a significant direct effect of both residual depressive symptoms and perceived cognitive impairment on functionality. In addition, residual depressive symptoms also have a direct effect on perceived cognitive impairment but no significant indirect effect on functioning via perceived cognitive impairment. The direct pathway between sleep disturbances and functioning was not significant, however, the SEM confirmed the presence of a moderate indirect effect of sleep disturbances on functioning via residual depressive symptoms and perceived cognitive impairments.