“…Because depressive symptoms are frequently observed in subjects with SMCs (Hohman, Beason-Held, & Resnick, 2011;Montejo et al, 2014;Sousa, Pereira, & Costa, 2015), previous studies have suggested that SMCs may constitute symptom constellations of depression (Balash et al, 2013;Balash, Mordechovich, Shabtai, Merims, & Giladi, 2010;Buckley et al, 2013;Chin, Oh, Seo, & Na, 2014;Zlatar, Moore, Palmer, Thompson, & Jeste, 2014). However, given that depressive symptoms also are known to be a risk factor for developing cognitive impairment and dementia, and the severity of depressive symptoms in older adults are well correlated with the burden of AD pathology (Lavretsky et al, 2009), the comorbidity of depressive symptoms in subjects with SMCs may play a significant role in the potential progression from SMCs to dementia.…”