90%. I was diagnosed at 5 and turned 50 this year.
Much of my life. Diagnosed at age 8 and am now 53. What is that? 85%? I was always told I'd be dead by age 25, so I'm happy:)
90%. Diagnosed at 3 and I'm 30 now.
60%... I was diagnosed when I was 7 and am 18 now!
I'll be 42 next week and was diagnosed just before my second birthday.
I'm 53. Was erroniously diagnosed as type II at 47 and correctly diagnosed as type I at 51. I figure that makes it a little over 11%, or about 3 3/4% that I've been dealing with it correctly. I just wish someone had figured out what type I really was sooner. It has been a lot less stressful dealing with it since I've been treating it correctly.
Just to let you know you aren't the only one. I was diagnosed as "probable" NIDDM (old term for T2) when I was 44, and started oral meds (sulfonylureas, which were all that was available) approx. a year later, and by 5 months after that, it was obvious that they weren't working, but I had to beg my doc for insulin. Which worked like magic. Now, I'm 65 (or will be next month!), and still taking that old clear magic, and have had great success with it. Yes, you CAN develop T1 at older ages, and while it may come on more slowly (not always), it's still T1. I think more docs are aware of that nowadays, but they pretty much weren't 20 years ago!
In the less than two years since I was correctly diagnosed I've met several others that were erroniously diagnosed as type 2 and were later (after varying lengths of frustration and doctors that wouldn't belive that they really were taking their medicines correctly, really eating as few carbs as they said they were, and/or really exercising as much as they said they were) finally tested and found that they were type 1! Before I was properly diagnosed our family doctor put me on long acting insulin when the endocrineologists wouldn't, which helped. I eventually got a referal to a new endocrineologist who really listined to me and believed me. He has a rather brusque manner that I don't normally care for, but I can live with that since I know that he really listens to what I have to say.
I was Diagnosed at 10-months-old and I am now 24... so thats about 98-99% of my life??? Im not sure...