Diabetes Facts

There are three main types of diabetes:

Type 1 diabetes is sometimes called insulin-dependent, immune-mediated or juvenile-onset diabetes. It is caused by an auto-immune reaction where the body’s defence system attacks the insulin-producing cells. The reason why this occurs is not fully understood. People with type 1 diabetes produce very little or no insulin. The disease can affect people of any age, but usually occurs in children or young adults. People with this form of diabetes need injections of insulin every day in order to control the levels of glucose in their blood. If people with type 1 diabetes do not have access to insulin, they will die.

Type 2 diabetes accounts for at least 90% of all cases of diabetes.Type 2 diabetes is sometimes called non-insulin dependent diabetes or adult-onset diabetes, and accounts for at least 90% of all cases of diabetes. It is characterised by insulin resistance and relative insulin deficiency, either of which may be present at the time that diabetes becomes clinically manifest. The diagnosis of type 2 diabetes usually occurs after the age of 40 but can occur earlier, especially in populations with high diabetes prevalence. Type 2 diabetes can remain undetected for many yearsand the diagnosis is often made from associated complications or incidentally through an abnormal blood or urine glucose test. It is often, but not always, associated with obesity, which itself can cause insulin resistance and lead to elevated blood glucose levels.

Gestational diabetes (GDM) is a form of diabetes consisting of high blood glucose levels during pregnancy. It develops in one in 25 pregnancies worldwide and is associated with complications in the period immediately before and after birth. GDM usually disappears after pregnancy but women with GDM and their offspring are at an increased risk of developing type 2 diabetes later in life. Approximately half of women with a history of GDM go on to develop type 2 diabetes within five to ten years after delivery.

Other specific types of diabetes also exist.

Fast Facts on Diabetes

Diabetes affects 25.8 million people of all ages
8.3 percent of the U.S. population

DIAGNOSED
18.8 million people

UNDIAGNOSED
7.0 million people

  • Among U.S. residents ages 65 years and older, 10.9 million, or 26.9 percent, had diabetes in 2010.
  • About 215,000 people younger than 20 years had diabetes—type 1 or type 2—in the United States in 2010.
  • About 1.9 million people ages 20 years or older were newly diagnosed with diabetes in 2010 in the United States.
  • In 2005–2008, based on fasting glucose or hemoglobin A1C (A1C) levels, 35 percent of U.S. adults ages 20 years or older had pre-diabetes—50 percent of adults ages 65 years or older. Applying this percentage to the entire U.S. population in 2010 yields an estimated 79 million American adults ages 20 years or older with pre-diabetes.
  • Diabetes is the leading cause of kidney failure, nontraumatic lower-limb amputations, and new cases of blindness among adults in the United States.
  • Diabetes is a major cause of heart disease and stroke.
  • Diabetes is the seventh leading cause of death in the United States.
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