Morning everyone,
I'll give my take on this.
@Knikki basal tests were invented for pump users who have far more options for varying their basal dose over a 24 hour period.
They have some use for injections. But, in my view, their usefulness is far more limited. If you are taking a 24 hour basal insulin, then the most important time span is overnight, so if it's stable overnight there is little point testing during the day, to see if it's at the correct level for day time, because then you'd mess up the night, which is far more important. Unless it was running out too early, or doing really weird things.
For Levemir, where the dose is split, it has some use, but it's still over a 12 hour period, and so the criteria used for measuring how well a pump basal test time period, is less useful. The basal insulin will have a peak, and during that time blood glucose is likely to fall more, than during other times. So that has to be factored in to the equation, as well as many other things, does our insulin sensitivity vary from day to day. If people want to know then great, but I'm not, personally, sure it's worth missing a meal for, when the usefulness of the data is quite limited.
So don't feel too bad about not knowing about basal testing. It's a bit like what happens with economics, where they pretend that maths really can predict what happens in a open human led system, there are too many factors to take into account to make it particularly reliable, as a fine tuning method, but it probably has use when it's obviously very wrong. But then wouldn't you know anyway?
but your never to old to learn. 
