* Doubled rate of premature death (largely attributed to accidental injury)

* 47% anxiety disorder comorbidity

* 38% severe mood disorder comorbidity (including depression)

* 15% substance abuse disorder comorbidity

Between the heightened risk of concussions, anxiety, depression, and substance abuse, it's not at all surprising that dementia shows up twice as often in the statistics. With that being said, it doesn't tell us much at all about whether there's a shared pathology.

"Dementia occurred among 96 of 730 participants (13.2%) with adult ADHD and 7630 of 108 488 participants (7.0%) without adult ADHD."

This really matters for things with a very low probability.

And the difference between the two is?

"Per cent means one hundredth of something. Percentage point is used when comparing percentages to one another. For example, when inflation drops from three to two per cent, inflation decreases by one percentage point and 33.3 per cent."

When you say it is 6 percentage points higher it means you had a percentage Y% and it is now (Y+6)%, a value which cannot be determined unless you know Y, never mind the reference absolute value it relates to.

In this particular case you can say it went from 7% to 13.2%, so if you ignore "%" as the unit the actual change is from 7 to 13.2; a ((13.2-7)/7) ≈ 0.8857 = 88% change. Had the original percentage been say 67%, a 6.2 p.p. change would have increased the percentage to 73.2%; a much smaller ((73.2-67)/67) ≈ 0.0925 = 9% change.

Had the change been "six percent of seven percent", the new value would be 7+7*(6/100) = 7.42 (percent).

One of my main symptoms was MCI. Interesting that after long term treatment not only the MCI improved or subsided but also my very long standing ADHD (present for as long as I can remember) got dramatically better, makes you wonder.

I have nasty seasonal allergies (at least one per season). Whenever it flares up, the is a marked increase in my needs and decrease in my productivity. I'm hoping to start immunotherapy for them soon. I get my ADHD and my allergies from my dad and immunotherapy has done him wonders.

I can’t speak to the dementia portion, but it would not surprise me. As for the adhd being the result of something ‘neurologically wrong’… I feel like we should replace ‘wrong’ with something less charged, maybe ‘sub-optimal’ or ‘problematic’, but you intuited your way into something I’ve spent years in therapy and reading books to finally grok.

Two specific books that come to mind: The Myth of Normal and What Happened to you

We can define wrong as counterproductive, while seeking to accommodate those configurations and seek to reduce their affects or mitigate them entirely

personally I feel that the symptoms of adhd are less relevant and doesn't impair my daily functions as much if I focus my entire waking time on outdoor activities like biking and swimming, and while I never hunted with primitive tools it might share some similarities

I think this is something that could be verified in practice too, since we still have hunter-gatherers societies