Click a letter to see a list of conditions beginning with that letter.
Click 'Topic Index' to return to the index for the current topic.
Click 'Library Index' to return to the listing of all topics.
Here are federal guides for when to
get checked for diabetes:
People older than 45 should be
tested for prediabetes or diabetes. If the first blood sugar (glucose) test is
normal, they should get tested again every 3 years.
People younger than 45 should
think about getting tested for prediabetes or diabetes if they are overweight or
obese and have other risk factors for diabetes. This means having a body mass index
(BMI) of 25 or more and 1 or more of the following risk factors. Asian Americans
should get tested if they have a BMI of 23 or more.
Have a mother, father,
brother, or sister with diabetes
Are part of a high-risk
ethnic group. This means African American, Hispanic, Asian, Pacific Islander,
Native Alaskan, or Native American.
Had heart and blood vessel
disease in the past
Have blood pressure at
140/90 mm/Hg or higher. Or are taking medicine for high blood pressure.
Have blood fat levels that
are not normal. For example, high-density lipoproteins (HDL) of less than 35
mg/dL. Or triglycerides greater than 250 mg/dL.
Are not active
Had impaired glucose
tolerance during a past test for diabetes
Are a woman with
polycystic ovarian syndrome (PCOS)
Have been diagnosed with
Have symptoms of diabetes.
These include increased urination, increased thirst, increased hunger, and
unexplained weight loss.
A diagnosis of diabetes
Any of the following test results confirm a diabetes diagnosis:
A1C level of 6.5% or
Fasting plasma glucose level
of 126 mg/dL or higher. Fasting means not eating or drinking except water for at
least 8 hours.
Casual plasma glucose level
of 200 mg/dL or higher, with the symptoms of high blood sugar (hyperglycemia) or
hyperglycemic crisis. This level can be measured at any time of day.
Oral glucose tolerance test
(OGTT) level of 200 mg/dL or higher. For this test, you fast for at least 8 hours.
Then you drink a sweet liquid that has a certain amount of glucose.
A diagnosis of gestational diabetes
Gestational diabetes is diabetes
that starts during pregnancy. All women who are at risk for type 2 diabetes should be
tested for diabetes at their first prenatal visit. This is done using the standard tests
above. More tests to check for gestational diabetes will be done later in pregnancy.
Gestational diabetes may be diagnosed with one of the methods below.
This is a 75-gram glucose
tolerance test. For this test, you drink a sweet glucose drink. Blood sugar levels
are checked after you have fasted for at least 8 hours. They are also checked 1 hour
after the drink and 2 hours after the drink. This test is done at 24 to 28 weeks'
gestation in women who have not been diagnosed with diabetes before. Gestational
diabetes is diagnosed when you have any one of the following blood sugar levels:
Fasting: 92 mg/dL or
1 hour: 180 mg/dL or
2 hour: 153 mg/dL or
This test is also done at 24 to
28 weeks' gestation in women who have not been diagnosed with diabetes.
Step 1. A
50-gram glucose tolerance test with a blood sugar level check at 1 hour. If the blood
sugar at 1 hour is 130 to 140 mg/dL or higher, then go to step 2.
2. A100-gram glucose tolerance test is done while you are fasting. Gestational
diabetes is diagnosed when you have at least 2 of the following blood sugar
Fasting: 105 mg/dL or
1 hour: 190 mg/dL or
2 hour: 165 mg/dL or
3 hour: 145 mg/dL or
Talk with your healthcare
provider about being screened for gestational diabetes. Women who have been diagnosed
with gestational diabetes should be tested for diabetes at least every 3 years.
Online Medical Reviewer:
Raymond Kent Turley BSN MSN RN
Online Medical Reviewer:
Robert Hurd MD
Date Last Reviewed:
© 2000-2019 The StayWell Company, LLC. 800 Township Line Road, Yardley, PA 19067. All rights reserved. This information is not intended as a substitute for professional medical care. Always follow your healthcare professional's instructions.