I've had cf related diabetes for 24 years now and was always perplexed as to why the heck i have it. My health was great at that time (i was 15), no lung involvement at all, my pancrease was never really a big problem for me ( still isnt) i take very low amounts of enzymes always did. My pancrease still secretes insulin, just not enough . Over the years i notice that right before my menstral cycle comes around my pancrease secretes plenty of insulin, and i do not have to take my daily injections for a day or two . This would kind of make sense, since insulin is actually a hormone. I have been on long -acting insulin the whole 24 years and it hasnt been a problem. One of the reasons we also get cf related diabetes is because our bodies have too much mucus and this can plug things up and gets in the way of our pancrease being able to secrete enough insulin. In answer to your qusetion about how high the blood sugar was when diagnosed, i know mine was over 1000, but i do not recall the exact number. It took many blood tests to get it diagnosed, because as i mentioned my pancrease does secrete insulin. They just had to catch my blood sugar at a time when it wasnt secreting enough. HOpe this helps, ~Diane 39 / diabetes / b.cepacia