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Avatar of Alison

by Alison

HbA1c: converting old to new

12 March, 2012 in Living with diabetes

Having had to resort to Dr Google to translate my latest HbA1c result into something meaningful, I thought it might be useful to publish a conversion table for new HbA1c measurements. Since October 2011 the way HbA1c results are expressed has changed – from % to mmol/mol. Mostly this has been done to mess with your head, but there is also a secondary reason about trying to standardise measures all around the world to make it easier to compare results from different laboratories and research trials.

Given the UK has been trying to shift from imperial to metric measurement since 1965 yet many people still repond to the question “how many metres is that?” with “about 3 feet” I’m thinking these changes may take a little while to sink in. So ShootUp has a handy guide.

Ye olde HbA1c measurement (%)       Shiny new IFCC HbA1c measurement (mmol/mol)
6.0                                                                           42
6.5                                                                           48
7.0                                                                           53
7.5                                                                           58
8.0                                                                           64
9.0                                                                           75

If you have a calculator to hand, you might want this handy formula to convert your own numbers:

New mmol/mol = [Old % - 2.15] x 10.929
Old % = [New mmol/mol divided by 10.929] + 2.15

So if your new number is 53, divide it by 10.929, then add 2.15 and round up a bit to discover that’s roughly 7% in old money.

And if your old number was 8% and you want to know what that means in the new world, take away 2.15 and then multiply the result by 10.929 to become enlightened.

Or you could use Diabetes UK’s handy HbA1c converter.

Avatar of Tim

by Tim

My latest A1C

20 October, 2011 in check ups

A diabetic goldfish and needless pictorial filler, yesterday

A diabetic goldfish and needless pictorial filler, yesterday

Yesterday, six months had rolled around again and it was back to the Royal Infirmary for my bi-annual check up (odd word ‘bi-annual’, does it mean twice a year or once every two years? One to ponder. Or not.)

The very familiar waiting room was the same as always and the goldfish in the remarkable well maintained fish tank were looking very spruce. I idly wondered if they were diabetic fish – the waiting room of a hospital diabetes clinic would after all be the best place for them – and, if so, how their daily injections would be administered. But then I abandoned that train of thought, mainly on the grounds that it was silly.

I also amused myself with the usual waiting room game of “Type One / Type Two?” Using inaccurate and crass diabetes stereotypes, I usually use the formula “younger and slimmer = type one”, “older and fatter = type two”. I also played the variant of the same game “Newly diagnosed diabetic / Diagnosed for years diabetic” which usually uses the formula “looking stressed and bewildered = newly diagnosed”, “relaxed and reading a good book = diagnosed sometime in the dawn of time”. This easily filled a good 90 seconds and I spent the rest of my wait reading the BBC news on my phone.

Anyway, eventually off we went to have blood pressure taken, to be weighed (very heavy boots) and to have a finger-full of blood extracted – all accompanied by the usual chat about the weather and holidays.

We then reconvened and, as I’m part of the pump clinic, I now get to see not only a consultant, but also my DSN, in addition to the dietician and – this time – a student nurse. Four against one.

My DSN did mention that some people thought that one diabetic versus four staff might be a bit intimidating for some. However, I said it wasn’t intimidating enough and suggested they should adopt an Apprentice-style boardroom, with huge throne-like chairs for the doctors and tiny, rickety stools for the patients. Sounds good to me – it would add much-needed drama to check ups!

Anyway, we went through a few bits and bobs – my pump settings, the fact that I just can’t get my temporary basal rates right while exercising, dry skin caused by high blood glucose levels (eugh, I know) and the intricacies of the dual wave bolus.

One quick foot check later and we were ready for my A1C results – 7.3, down from 7.4 six months ago.

I’m happy enough with this but it’s not as low as it was when I was on MDI, where I hovered around the mid-sixes. I know the pump has allowed me to have considerably better control than MDI and my levels are much more consistent. I suspect my A1C is higher because I’m having far, far, far, far fewer hypos.

So I’m not sure that the A1C is the best method of measuring the “success” of one’s control – it’s just far too crude by itself. We need something involving more blood glucose readings and standard deviation or something like that. But my basic arithmetic is so poor that such heightened mathematics are far beyond my ken. Ho hum.

Changes in HbA1c measurement delayed

12 May, 2011 in news

Planned changes to the way in which HbA1c measurements are reported have been postponed from June 2011 until October 2011 basically because no one understands the changes and people are understandably a tad underwhelmed and befuddled by them.

This dog was hoping one of the ShootUp authors would have gotten their heads around this by now and actually written about the planned changes to move from reporting HbA1c’s as a percentage eg 6.5% to a figure in mmols/mol eg 48 mmol/mol. Sadly, both Tim and Alison have remained resolutely silent on the issue, probably because they’re struggling to care and suppressing irritation that we’re wasting time and effort changing a system they’re comfortable with. But that’s just this dog’s opinion.

Diabetes UK have the full story: http://www.diabetes.org.uk/About_us/News_Landing_Page/Change-in-measurement-of-HbA1c-delayed/

For more info and a calculator to help convert old to new try here: http://www.diabetes.org.uk/hba1c

Avatar of Tim

by Tim

My latest MOT

13 January, 2011 in check ups

Check out that silver lining

Check out that silver lining

It’s that time of the year again – yesterday saw me indulge in my regular trip up to the Royal Infirmary to be prodded, pricked and poked as part of my regular seven-month check up, my first after getting the pump back in November.

I’m going to be up front and tell those of you with a more ghoulish disposition (that is, all of you) that I’m afraid that nothing bad was discovered. My feet haven’t rotted off in the last seven months, I’ve not gone blind and I still have the use of my fingers. Sorry to disappoint.

This time I was seen by the pump clinic, instead of just the normal clinic, so I was met by not only the doctor but also by my usual specialist nurse and the dietician I saw when I was first diagnosed. It felt a little mob-handed but at least I could ask any questions and get top notch answers. However, I didn’t really have any questions and they all seemed entirely satisfied with what I’d achieved with the pump over the last two-and-a-half months.

I’ve now pretty much managed to get my basal levels working well for me, carb counting is fairly straightforward, I understand the concepts of glycaemic load and all that jazz, I’ve used all the features on the pump (except for dual waves – which I used for the first time last night), I don’t have any problems with the sets, my A1C was in target (6.9%). I know in the diabetic blogosphere it’s unusual to report this sort of thing, but everything was absolutely fine – all four of us were perfectly happy with the pump and my control.

But there must have something bad surely? Every visit to the diabetic clinic incorporates something depressing , no? Well there was something. While in the waiting room I noticed one the goldfish in the aquarium had a little bit of fin rot – the poor wee mite. See, it’s not all silver lining.