Cause and effect is also questioned in (much larger) studies: https://www.healthline.com/health-news/the-surprising-link-between-bedtime-and-dementia https://ww

Cause and effect is also questioned in (much larger) studies: https://www.healthline.com/health-news/the-surprising-link-between-bedtime-and-dementia https://www.healthline.com/health-news/the-surprising-link-b... Interesting quotes: " The study found that []longer[] time spent in bed (TIB) was associated with significantly []increased[] dementia risk. Those in bed for more than 8 hours were far more likely to show a cognitive decline during a Mini Mental State Examination (MMSE) [...] The time individuals went to bed was also highlighted by researchers as a critical contributing factor [...] The research paper stated that “every 1 hour advance in bedtime [before 10 pm] was associated with a 25% increased risk of dementia.” "