Odor identification and discrimination as markers of early Alzheimer’s disease

Reliable markers are essential in order to achieve accurate diagnosis in the early stages of Alzheimer’s disease (AD). Olfactory impairment has been identified as a possible non‐invasive biomarker of AD. Odor identification tasks are most commonly used for measuring olfactory abilities. However, odor identification is associated to verbal abilities and cultural context. The aim of this study was to determine whether odor discrimination could be a valid marker of early AD.