Risk factors for TYPE 1 

Although the exact cause of type 1 diabetes is unknown, factors that may signal an increased risk include:

Family history.Your risk increases if a parent or sibling has type 1 diabetes.

Environmental factors. Circumstances such as exposure to a viral illness likely play some role in type 1 diabetes.

The presence of damaging immune system cells (autoantibodies). Sometimes family members of people with type 1 diabetes are tested for the presence of diabetes autoantibodies. If you have these autoantibodies, you have an increased risk of developing type 1 diabetes.

Dietary factors. These include low vitamin D consumption, early exposure to cow’s milk or cow’s milk formula, and exposure to cereals before 4 months of age.

Geography. Certain countries, such as Finland and Sweden, have higher rates of type 1 diabetes.

              Risk factors for Pre-Diabetes and TYPE 2

Researchers don’t fully understand why some people develop prediabetes and type 2 diabetes and others don’t. It’s clear that certain factors increase the risk, however, including:

Weight. The more fatty tissue you have, the more resistant your cells become to insulin.

Inactivity. The less active you are, the greater your risk.

Family history. Your risk increases if a parent or sibling has type 2 diabetes.

Race. Although it’s unclear why, people of certain races including blacks, Hispanics, American Indians and Asian-Americans are at increased risk.

Age.

Gestational diabetes. If you developed gestational diabetes when you were pregnant, your risk of developing prediabetes and type 2 diabetes later increases.

Polycystic ovary syndrome. For women, having polycystic ovary syndrome, a common condition characterized by irregular menstrual periods, excess hair growth and obesity.

High blood pressure. Having blood pressure over 140/90 is linked to an increased risk of type 2 diabetes.

Abnormal cholesterol and triglyceride levels. If you have low levels of high-density lipoprotein (HDL), or “good,” cholesterol, your risk of type 2 diabetes is higher. Triglycerides are another type of fat carried in the blood. People with high levels of triglycerides have an increased risk of type 2 diabetes. Your doctor can let you know what your cholesterol and triglyceride levels are.

http://www.mayoclinic.org/diseases-conditions/diabetes/basics/risk-factors/con-20033091