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John Mitchell

John Mitchell

New Zealand rugby union coach

Aug 27, 2026

22:03
Can you tell us about that? And just to begin with, just make sure we understand where it comes from, what it's attached to, et cetera.
22:13
Absolutely, yeah.
22:14
So, um, it's attached to a larger study, the, the MTA, the Multimodal Treatment Study of ADHD, and that was a study that began, um, in the nineties and, uh, took place in the nineties, uh, largely the treatment phase of it, and it took place in seven different sites in the United States and in Canada.
22:34
And the MTA was focused on, uh, comparing the effects of medication and behavior therapy, and, uh, so they included over five hundred children with ADHD.
22:46
And, uh, and it was a study where the intervention lasted for about f- for fourteen months, and then, uh, after the intervention ended and different people in the different treatment conditions then were free to pursue whatever kind of treatment that they wanted, the, the effects of the treatment largely fell away, and then at that point, and which is what we'd would expect, and then at that point it went from a treatment study to a long-term observational study.
23:13
And so the MTA followed these children up until their mid-twenties, uh, mid to late twenties, and it had eight assessments over a sixteen-year period, so this is a very well-characterized sample.
23:26
And the qualitative interview study was something that began when they were in their, uh, early to mid-twenties, and I was lucky to be a part of that.

15 MINS LATER

39:02
Do kids with ADHD turn into adults with ADHD, or how often do they?
2:26
Um, it would be really great if you could maybe even start by giving us a little bit of the history of the ABTS and the structure and, for example, how to g- how to get involved, how you got involved.
2:39
Absolutely.
2:39
So, uh, the ABTS was formed in nineteen forty-eight, uh, from a group of surgeons that represented the AATS and the ABS.
2:51
And for many years it was, uh, a sub-board of the ABS.
2:56
But in nineteen seventy-one, uh, it became its own standalone board, joined the, uh, uh, uh, cadre of full-fledged boards, uh, and out from under the ABS, uh, umbrella.
3:13
So that's where it stands today.
3:16
Uh, the headquarters are in Chicago.

27 MINS LATER

30:24
Um, uh, can you let us know about some of the other projects that, that you're working on?
0:23
I've been talking to Dr John Mitchell from University College London, who's the study's lead author.
0:29
Our research is funded by Cancer Research UK and co-designed by the public to ask which behavioral changes in our day could we theoretically perform in order to try and mitigate risk of cancer.
0:43
So we utilize a very large data set called the UK Biobank, which is around 60,000 individuals who all wore a smartwatch essentially on their wrist for about a week.
0:53
And then we followed them up for about eight years to see which cancer sites individuals got or those individuals who did not get cancer diagnosis.
1:02
And what we really saw was that we corroborate findings, the evidence which suggests that moving more at any speed is very favourable and reduces risk of cancer, regardless of the intensity.
1:16
That's probably the key message and is very reassuring for individuals.
1:19
Importantly, however, intensity does matter.
3:52
So people then who, say, have a job that involves a lot of movement or maybe some lifting, they're at an advantage here?

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