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Screening Tests for Type 2 Diabetes

Updated at: Feb 09, 2012
Written by: Gunjan RastogiPublished at: Feb 07, 2012
Screening Tests for Type 2 Diabetes

Screening tests for diagnosing type 2 diabetes will help you take preventive measures if you are diagnosed with pre-diabetic symptoms or diabetes.

With an exponential increase in diabetic cases, diabetes-screening tests have become a good preventive method to keep a check on blood sugar levels. If the test shows positive result, you are diabetic or pre-diabetic. A negative result means a normal blood sugar level. The diagnosis of diabetes-screening tests helps you in seeking further medical advices from a doctor or a diabetic specialist. Different screening tests have different procedures and are measured on different levels of mg/dl.

Some of the main  diabetic screening tests are given below:  

Oral Glucose Tolerance Test (OGTT)

  • Method - Type 2 diabetes can be diagnosed through OGTT. Usually performed in the morning, it requires a person to fast for 8-12 hours. First, the blood sample is drawn from the patient’s body following which he/she is given glucose solution to drink within a period of 5 minutes. Once the patient has had the glucose, blood is drawn at alternate intervals for measuring blood sugar (glucose) level.
  • Dose of Glucose Given - WHO has recommended a 75 g of oral glucose dose for all adults. Children are given an amount of glucose solution according to their weight.
  • Substances measured - Blood sugar level and renal glycosuria (amount of sugar excreted in urine despite normal body sugar).
  • Diagnose - If a person has two-hour blood glucose in between 140 and 199 mg/dl, he is diagnosed with pre-diabetes or impaired glucose tolerance (IGT). A diabetic person has  two-hour blood glucose above 200 mg/dl.

Fasting Plasma Glucose Test

  • Method - It requires a person to keep a fast for 8-12 hours. After the fast, the glucose (blood sugar level) is measured once.
  • Diagnose - A person with 100 mg/dl has normal glucose level. Between 100 and 125 mg/dl means, a person has pre-diabetes or impaired fasting glucose. If blood sugar level rises above  125 mg/dl, the person is diabetic.  

Postprandial Glucose Test

  • Method - In postprandial blood sugar test, a person’s glucose level is checked exactly 2 hours after the consumption of meal. A blood sample is drawn.
  • Diagnose - Two hours after meal, healthy people have normal blood sugar level and diabetic people have elevated blood sugar level. The postprandial glucose level of a person must be under 180 mg/dl.

It is advisable to contact trustworthy pathological labs to carry out these tests. If diabetes is confirmed, consult a doctor to help you devise a well-balanced diet and healthy lifestyle.


Read more articles on Type 2 Diabetes Mellitus Diagnosis



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