Dr. Douglas Lucas

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736 appearances 1 recordings 1 series first heard Jul 2026 last heard 28 Jul

Dr. Douglas Lucas’s voice in public audio — every appearance, attributed to the second.

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Recordings per month over the last 12 months — 1 in all, peaking in Jul 2026 with 1.

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The Dr. Gabrielle Lyon Show · 5 Hidden Causes of Bone Loss (#4 Is a Shock) - Dr. Douglas Lucas · 28 Jul 2026 podcast

It's a huge hole.

I'll add one more layer to that, if you'll let me, which is that one of the challenges around DEXA is the variability from scan to scan.

Even using the same machine, the same operator on the machine, there is variability called LSC, or least significant change,

from scan to scan.

And it's essentially the margin of error, right.

And so the LSC is well calculated on different machines, and it should be actually reported on the on the report, then it could be anywhere from, you know, a little under 2%, all the way up to almost 6%.

So now we have this machine that isn't telling us about quality at all and has an up to 6% variability measure from scan to scan, knowing that our bone density is really only changing for most people, one, two, maybe 3% per year.

So now we can't even say that those gains or losses are real if it's within that margin of error.

Yeah, it's a great question.

And this is there's so much confusion around T score and Z score.

Because I get these questions all the time around Z score, people want to use the Z score.

If you are over the age of 50, we're going to talk T score, right?

Because you're comparing with the T score actually to your younger, you know, gender and race related self, right?

So you're, you know, you're 20 something year old you.

When you are in your 30s, and even 40s, we want to use z score, because z score is comparing you to your age match population.

So what you want to know is where are you compared to others like you, and then you can say, well, I'm above average, I'm below average, knowing that average for that age group is quote unquote, okay, is still the general population.

But at least you're not in your 80s or 90s where average is osteoporosis.

And this is why we split and start using a T-score after the age of 50.

So I think there's two ways that they do it.

So one is you can look at these massive cohort studies who have had DEXAs and we know T-scores and Z-scores.

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