This seems fairly obvious on the surface, the relationship between sleep and cognitive decline have been "known" for a long time.
However, saying Apnea or insomnia increase the risk of dementia ignores the fact that apnea and chronic insomnia (not transitory) decrease the restorative function of sleep. That's what we need to be focused on.
I'm not saying people with chronic insomnia should ignore these issues, but the cognitive response to CPAP is inconclusive[1].
As the co-founder and CEO of https://affectablesleep.com, I'll admit I'm biased, as we focus on enhancing the restorative function of sleep, which we believe should be the primary focus of sleep health, not "how long did you sleep".
[1] https://academic.oup.com/sleep/article/47/12/zsae161/7712690
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