Yuppa...southwest corner of the North Slope, about 180mi NW of Kotzebue...I've got two girls in Anchorage and freinds scattered from Petersburg to Prudhoe Bay, including Palmer. I get down to Anchortown a few times every year...visit friends in Palmer, Wasilla and big lake so maybe we can have a cup of coffee one of these times.
Anyway, the 117 was fasting glucose only you weren't fasting so the number is not that alarmingn considering the food and candy you ate prior to the test...I bet if they'd waited another 30 minutes for the candy to ingest you would have recorded a higher number....it's a good sign that they want to take it a step further with more tests though...it's the only way you'll put your mind to rest one way or the other. The GTT is exactly what you said...you ingest 75g of glucose and they take blood sugar readings over a timed period. Your response to this test will indicate whether or not your insulin response is normal or insulin resistant/diabetic.
A couple of things. Take a look at
THIS SITE (clik2vu) and check out the forums. There are several members there that have recently or are soon to take a GTT and the discussion is very informative.
Also, here are the new diabetes guidelines...they will help put some of the numbers whizzing around you in context. If it helps at all the outcome of your GTT will settle the issue and you will either go on as a normal person or, the alternative...end up with a very interesting new hobby..
The Joslin Center (and ADA) have recently updated their "non-diabetic" ranges. If your blood sugars are above these numbers, then you might have diabetes or pre-diabetes. The new numbers I refer to are probably lower then the ones your MD checked yours against, but are likely to be used by an up to date diabetes MD in any evaluation.
These are the new blood sugar readings in (mg/dL):
Before Breakfast 60-100 mg/dL
Before lunch supper and bedtime: 60-120 mg/dL
1 hour after meals: < or = 140 mg/dL
2 hours after meals < or = 120 mg/dL
2am - 4 am > or = to 70 mg/dL
A1c 4.0 to 6.0% (indicates average blood sugars over last three months)
** as reported by the Joslin Diabetes Center at Upstate Medical University