Reading FRAX and ASCVD as Long-Term Strategy

If you've ever calculated your FRAX — the fracture risk calculator from the WHO that we covered in chapter eleven — you might have gotten a number like "8.2%" and thought: now what?

Here's the thing. FRAX isn't a verdict. It's a probabilistic forecast: the probability that in the next ten years you'll have a major osteoporotic fracture — spine, hip, forearm, or shoulder. Eight percent means: if you take a hundred women with your parameters, eight of them will have such a fracture over ten years. The other ninety-two won't.

That already shifts how you see the number.

But the most interesting thing isn't even that. The most interesting thing is that FRAX calculates the risk assuming you don't change anything. So it's not a prediction. It's a snapshot of one possible future — the one where you keep living the way you're living now. And that snapshot can be retaken.

Same with ASCVD — or QRISK3, depending on what country you're in. These are ten-year cardiovascular risk calculators. They take your age, blood pressure, cholesterol, smoking status, diabetes, a few more parameters — and give you a percent.

You get, say, "12%." And what? Twelve percent isn't a prediction of what's going to happen to you. It's group statistics. And like FRAX, this number is calculated assuming you don't intervene.

If you quit smoking — the number shifts. If your blood pressure comes down — the number shifts. If your lipid profile improves — the number shifts. The calculator works with what you put into it today. And you're not a static woman in a table.

Here are three questions worth asking about any number like this. They work for FRAX, for ASCVD, and for any other risk calculator you'll come across.

First: what goes into the formula? Meaning which parameters affected your result most. For FRAX it's age, history of previous fractures, parental fractures, and — if you have DEXA results — bone density. If you haven't done a DEXA yet, FRAX still works, just less precisely. For ASCVD it's blood pressure, cholesterol, and smoking. If you understand the levers in the formula — you understand the levers in real life.

Second: what's NOT in the formula? FRAX doesn't account for strength training. ASCVD doesn't account for lifestyle in detail. Your reality is always richer than the model. The formula is a simplification — you're a whole life.

And third: where's the threshold for action? For FRAX in the US it's usually 20% on major fractures or 3% on hip. In the UK, Australia, Canada the thresholds differ and depend on age, too. The exact numbers for your country and your profile — that's a conversation with your doctor. For ASCVD in the US it's often 7.5%. For QRISK3 in the UK — around 10%. Other countries use their own calculators. The number at which statins enter the conversation is always tied to your country's guideline — ask your doctor which one is used where you are.

Now look at what happens when you come back five years later. Say at forty-six you calculated FRAX and got 6%. That meant: moderate, not elevated, risk. What did you do over the next five years? Started strength training. Brought vitamin D to target. Adjusted protein. Maybe — talked to your doctor about MHT.

At fifty-one you recalculate FRAX. Only now you have another number — your bone density from DEXA. If strength training worked — density didn't drop, or dropped less than expected. If you're on MHT — major studies show vertebral and hip fracture risk drops by thirty to forty percent, while therapy continues. After stopping, the effect gradually fades. The calculator number becomes different. Maybe 5%. Maybe 4%. Not because time stopped. Because you changed the trajectory.

And the same with ASCVD. Quit smoking — minus a significant share of risk. Blood pressure down — another minus. Every improvement in the parameters of the formula shifts the number. The number that was 12% at forty-six could be 8% at fifty-one. That's the strategy.

One last thing. What to do with these numbers at your doctor's appointment — because that's, really, the whole point of running them.

Print the results. Bring them on paper. It's a small thing, but it changes the conversation: your doctor looks not at your abstract worry, but at concrete numbers.

Say: "I calculated FRAX — ten-year major fracture risk eight percent. ASCVD — ten-year heart attack or stroke risk twelve percent. What does this mean for me now, and what are we going to look at in a year?"

That question — what are we going to look at in a year — moves the conversation from "here are your numbers" into strategy. And you came prepared.

Numbers aren't a verdict. They're coordinates. And five years from now you'll come back and see how they've shifted. If they've shifted in your direction — that's the compound interest we talked about in chapter thirteen.