I am 52, over 250 lbs with cardiomyopathy & pulmonary hypertension. My most recent bloodwork showed blood glucose of 121, which my doc says is borderline diabetic. My sister(an RN) says that has been changed to anything over 110 is diabetic. She also states I should have a hemoglobin 1c test and if that is over 6 than I am diabetic. Is this correct info?