A 2018 study suggested that three types should be abandoned as too simplistic. It classified diabetes into five subgroups, with what is typically described as type 1 and autoimmune late-onset diabetes categorized as one group, whereas type 2 encompasses four categories. This is hoped to improve diabetes treatment by tailoring it more specifically to the subgroups.
The WHO estimates that diabetes mellitus resulted in 1.5 million deaths in 2012, making it the 8th leading cause of death. However another 2.2 million deaths worldwide were attributable to high blood glucose and the increased risks of cardiovascular disease and other associated complications (e.g. kidney failure), which often lead to premature death and are often listed as the underlying cause on death certificates rather than diabetes. For example, in 2014, the International Diabetes Federation (IDF) estimated that diabetes resulted in 4.9 million deaths worldwide, using modeling to estimate the total number of deaths that could be directly or indirectly attributed to diabetes.
If you bring your blood sugar into the healthy range (a hemoglobin A1C reading of 7% or lower), you'll reduce your risk of nerve damage by 60%, according to research from the National Institute of Diabetes and Digestive and Kidney Diseases. "Healthy blood sugar levels can slow the process and ease the pain of diabetic neuropathy," says Aaron I. Vinik, MD, PhD, the director of the research and neuroendocrine unit at Eastern Virginia Medical School.