Association between multimorbidity, subjective memory decline and cognitive performance in older adults.

High multimorbidity rates co‐existing with Alzheimer’s disease (AD) have been interpreted as a consequence of dementia progression. Little is known about multimorbidity’s relationship with cognition as an underlying factor capable of accelerating the progression and onset of the disease. Here we examined the relationship between multimorbidity, cognitive performance and subjective memory decline in older adults in a large representative dataset.