Dementia risk was 69% higher in older adults who slept for more than 8 hours per night, and 2 times higher for those who went to bed before 9 pm. Study of 1,982 older adults in China who were free of dementia at the start of the study, 97 participants were diagnosed with dementia during an average follow-up of 3.7 years. Early bedtime and mid-sleep time were significantly associated with incident AD (HR range: 2.25–2.51; p < 0.05)Read Long Article
