When one considers the fact that, people, whose readings are firmly in the pre diabetic threshold still have complications, I believe its wise that people should be proactive about this condition.
A T2DM diagnosis is merely indicative that a persons BG levels has crossed the line into the diagnostic criteria.
Long before this, we are talking decades sometimes, the metabolic dysregulation has been doing its damage and destroying organs whether with, or without reaching that threshold for a formal T2DM diagnosis.
That is the nature of the twin destructive beasts known as hyperinsulinemia and insulin resistance.
For those with a disposition toward the condition, its the high insulin levels associated with IR or Hyperinsulinemia, that drives most of the pathology associated with the condition.
I am of the belief that people should not wait for a formal diagnosis, which as far as I'm concerned is some nebulous criteria, that changes from one country to another, and or from one year to another, to inform their decision to take action and look after themselves.
I strongly believe we whose metabolic dysregulations decided to manifest itself with T2DM are a lucky few.
There are those whose metabolic dysregulation showed up as:
High Blood Pressure with its attendant catastrophic consequences
Strokes from all manner of disseminated arterial disease
Cardiovascular disease and its life limiting characteristics.
And these folks never had a chance to know what was going on, before it was detected at their autopsy.