A comparison of cognitive factors identified by Exploratory Factor Analysis of the original ADAS‐cognitive subscale and a novel extended version in mild cognitive impairment and Alzheimer’s dementia

This study demonstrated that most of the identified cognitive factors were able to discriminate between the three groups with the exception of the praxis factor from the oADAS, which did not demonstrate significant differences between the MCI and control groups. More research is needed to further determine which subtests from the oADAS and eADAS are most sensitive to cognitive changes in normal and abnormal cognitive aging.