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Preventive Care
Risks and causes of prediabetes
July 4, 2019

Prediabetes is defined when the blood sugar is elevated than the normal values but not yet high enough to be diagnosed as diabetes . It is the pre-diagnosis of diabetes. Without lifestyle changes, people with prediabetes are very likely to progress to developing type 2 diabetes.

Diagnosis of categories of prediabetes

Impaired glucose tolerance and Impaired fasting glucose are two entities in the causes of prediabetes

  • Impaired glucose tolerance (IGT) is diagnosed if 2 hour post glucose load plasma glucose is between 140-199 mg/dl with a fasting plasma glucose value in the non-diabetic range.
  • Impaired fasting glucose (IFG) is diagnosed if fasting plasma glucose is between100-125 mg/dl

Individuals in these two categories have increased risk of progressing to diabetes and are also considered to be at high risk of cardiovascular disease.

Risk factors

The same factors that increase the risk of developing type 2 diabetes increase the risk of developing prediabetes. These factors include:

  • Being overweight or obese: The more fatty tissue that is present, the less sensitive to glucose the cells become. This is one of the major causes of prediabetes.
  • Excess fat around the abdominal region: For women, a waist size over 35 inches is linked to a higher prevalence of prediabetes. For men, a waist size over 40 inches is considered a risk.
  • Age: Prediabetes can develop in anyone of any age, but the risk of pre-diabetes is thought to rise after the age of 45 years. This may be due to inactivity, poor diet, and a loss of muscle mass, which typically declines with age.
  • Diet: Excess carbohydrate, especially sweetened foods or beverages, can impair insulin sensitivity over time. Diets high in red or processed meats are also linked to the development of prediabetes.
  • Sleep patterns: People with obstructive sleep apnea have an increased risk of developing prediabetes.
  • Family history: Having an immediate relative with type 2 diabetes significantly increases the risk of developing prediabetes
  • Stress: During periods of stress the body releases the hormone cortisol into the blood stream, raising blood glucose levels.
  • Gestational diabetes: Women who develop gestational diabetes during pregnancy, and their children, are at a higher risk of developing the condition.
  • Polycystic ovary syndrome (PCOS): Women with PCOS are more susceptible to insulin resistance, which can lead to prediabetes,
  • Ethnicity: The risk of developing pre-diabetes tends to be higher for African-Americans, Native Americans, Hispanics, Pacific Islanders, and Asian Americans. The reason remains unclear.

Causes of prediabetes

In prediabetes & Type 2 diabetes, cells become resistant to the action of insulin, and pancreas is unable to make enough insulin to overcome this resistance. Instead of moving into the cells where it’s needed for energy, sugar builds up in the bloodstream. Exactly why this happens is uncertain, although it’s believed that genetic and environmental factors play a role in the development of prediabetes& diabetes . Being overweight is strongly linked to the development of type 2 diabetes, but not everyone with type 2 is overweight.

Eating healthy food, losing weight and staying at a healthy weight, and being physically active can help you bring your blood glucose level back into the normal range.


Dr. Mohan’s Diabetes Specialities Centres at Chennai, Bangalore and Hyderabad  was awarded “Service Excellence in Diabetology – South” award by the Times of India Survey 2020-2021 conducted by AVANCE. Chennai      Hyderabad Bangalore We are proud to announce that we have been selected as India’s No.1 Diabetes Hospital (in Private sector) by THE WEEK …

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