Investigation of AlzHeimer's Predictors in Subjective Memory Complainers - Extension Study
A regional, single-center, prospective, observational academic cohort will follow subjects who previously participated in the INSIGHT study and who agree an extension of their follow-up in the INSIGHT-2 research for additional 5-6 years. An annual multimodal evaluation (cognitive, oculomotor, biological and neuroimaging) will be proposed in order to describe the natural history of preclinical Alzheimer's disease (AD). The primary endpoint is the conversion to the symptomatic stage in subjects at risk, identified by positive amyloid staining (A+) on florbetapir positron emission tomography (PET) imaging. The size of the cohort is estimated to around 240 participants (61 A+ subjects) among the 318 participants included in the main cohort (88 A+ subjects). The follow-up in the INSIGHT-2 cohort will be lightened compared to that of the main cohort with an annual frequency of visits rather than a six-monthly one.
• Subjects that previously participated in the INSIGHT cohort
• Aged 70 to 95 years old
• Having signed an informed consent
• Willing to and able undergo a baseline PET amyloid imaging
• Affiliating to the French health-care system
• Having an identified informant who has sufficient contact with the participant and has to be able to provide accurate information, at least by phone, about the participants' cognitive and functional abilities.