I am not familiar with the results just with the technique.
I do know that the result is to the quantity of c-peptide relative to the quantity of glucose.
Thus,
If the sugar level is high and not much c-peptide or none: the pancreas doesn't produce enough insulin.
type 1
If the sugar level is high and level of c-peptide is much higher:
insulin resistance.
type 2
I can only guess that the result of 2, means that there are double amount of c-peptide that should be relativly to the amount of glucose. Again, this is my guess only.
The stress didn't cause the diabetes. It turn nonclinical insulin resistance to clinical. If not on that time it would apear later.