Prediabetes is information, not a verdict

A blood test comes back. Somebody uses the word prediabetes, possibly in a hallway, possibly on a portal at nine at night with nobody to ask.

Then one of two things happens. Either it lands as nothing, because of the “pre”, and you file it away. Or it lands as a diagnosis of something frightening, and you spend a week reading things at three in the morning that do not apply to you.

Neither is right. Here is the useful version.

What the number actually is

Prediabetes means your blood sugar is higher than the usual range and not high enough to be called diabetes. It is defined by numbers, not by how you feel.

In Canada, the clinical practice guidelines from Diabetes Canada put prediabetes at an A1C of 6.0 to 6.4 per cent, a fasting blood sugar of 6.1 to 6.9 mmol/L, or a two hour value of 7.8 to 11.0 mmol/L on a glucose tolerance test. Any one of them can be the reason the word came up.

A1C is the one you will hear most. It reflects roughly the last three months of your blood sugar rather than this morning, which is why it does not move because of what you ate yesterday, and why it does not move the week after you make a change either.

Almost nobody has symptoms at these numbers. Feeling completely fine is the expected finding, not a reassuring one.

It is a reading with somewhere to go, and you have some say in the direction.

Why “pre” undersells it

The prefix makes it sound like a waiting room. Two things make it more than that.

First, where it can go. A meaningful share of people with prediabetes go on to develop type 2 diabetes, some within a few years. Others stay where they are for a long time, and some return to the usual range. Which of those happens is partly out of your hands and partly not.

Second, and less well known, prediabetes rarely travels alone. It tends to arrive alongside blood pressure that has crept up, cholesterol that is off, and extra weight around the middle, and that combination affects your heart and blood vessels while your blood sugar is still described as pre anything. This is why your care team will look at your blood pressure and your cholesterol at the same visit, rather than only watching your sugar and waiting.

That is the honest case for taking it seriously. It is not that you are nearly diabetic. It is that this is the point where changes do the most.

What actually changes the direction

Here the evidence is unusually good, and it is worth naming rather than gesturing at.

The Diabetes Prevention Program, a large trial in the United States published in 2002, took people with blood sugar in this range and compared a structured programme of modest weight loss and regular activity against usual advice. Over about three years, the group doing the programme developed type 2 diabetes at roughly half the rate. A group taking metformin also did better than usual advice, though not by as much.

Two things in that are worth holding onto. The weight loss involved was modest, in the range of a few kilograms for most people, not a transformation. And the activity target was about half an hour of ordinary walking most days, not training.

That is the shape of it: small, boring, repeated. Sleep, food, movement and stress all feed into the same system, and the changes that stick are the ones that fit the life you actually have.

Some people are also offered medication at this stage. That is a decision for you and your prescriber together, based on your numbers, your other conditions and your risk, and not something to start, stop or adjust on your own.

What this is not

It is not a personal failing. Family history, age, ethnicity, medications you take for other conditions, a pregnancy where your sugar ran high, sleep apnea and plain genetics all push these numbers, and none of them is a choice you made.

It is not a diet sentence either. Nobody needs you to eat differently from your household forever starting Monday. The things that move this are the ones that survive a hard week.

And it is not permanent by definition. The number is a measurement of right now. It was different two years ago and it will be different again.

Worth a word with your care team

Ask three plain questions: which test gave this result, what the number was, and when it should be repeated. Write the answers down. A single reading is a point, and what matters is the direction over time.

Say something sooner if you develop the symptoms that suggest blood sugar has gone higher: unusual thirst, needing to pass urine much more often, especially overnight, weight loss you did not intend, blurred vision, or cuts and infections that are slow to heal. Those warrant a call rather than waiting for the next scheduled test.

Also mention it if you have polycystic ovary syndrome, if you had gestational diabetes in a pregnancy, if you take a steroid or an antipsychotic medication long term, or if type 2 diabetes runs in your family. Each of those changes how closely your team will want to watch.

One small place to start

Find out your actual number and the date it was taken, from the lab report or your family doctor’s office, and write both down somewhere you will find them.

Then pick one thing that already exists in your week and make it slightly bigger. The walk you already take, the vegetables you already buy, the bedtime you already know you should keep. One thing, kept for a month, is worth more than five things kept for four days.

If you are a 360Care member, send your number to your care team in the app. A dietitian or nurse will tell you what it means for you specifically, and what is worth doing before the next test rather than after it.