Background
Hyperglycemic crisis, which includes Diabetic Ketoacidosis (DKA) and Hyperglycemic Hyperosmolar State (HHS), is one of the most common and serious acute complications of diabetes, and has highly mortality. The increase in the prevalence of diabetes in the geriatric population leads to a large disease burden. 

Aim
We aimed to evaluate the Mortality of hyperglycemic crisis among diabetes patients using nationwide annual claim data from the National Health Insurance Service (NHIS) database

Method
Using the NHIS claims database from Jan. 1st, 2004 to Dec. 31th, 2013, we analyzed data to identify hospitalization via emergency department having as a principal or first additional diagnosis at discharge which were determined by the ICD-10 code for hyperglycemic crisis of diabetes. Detailed analysis of  Mortality in Hyperglycemic Crisis inpatient in Korea was performed.

Results
The Mortality rate of hyperglycemic crisis episodes in patients with diabetes decreased from 44% in 2004 to 15% in 2013. Of the total 4,908 patients treated in 2006, the survival rate was 4,044, with a survival rate of 82%, and Of the total 5,079 patients treated in 2008, the survival rate was 4,557, with a survival rate of 90%. There was a significant increase in survival rate. The death rate of hyperglycemia per 100,000 diabetic population was significantly reduced from 78.4 in 2004 to 45.1 in 2006, 24.8 in 2008, 38.5 in 2010 and 32.6 in 2013. Annual Hyperglycemic mortality rate per 100,000 population of diabetics decreased significantly in all age groups and in each gender over 10 years. 59.1% of all deaths occurred within two months after discharge, and deaths within one year accounted for 88.0% of all deaths. Estimates the annual mortality rate and the total number of deaths per year based on the data for 10 years from 2004 to 2013. Although the mortality rate is decreasing, the annual number of cases will increase sharply until 2030 due to population aging, increased prevalence of diabetes mellitus, and prolonged life expectancy.

Discussion
In Hyperglycemic crisis Care, Survival rate have increased and mortality rate decreased.

However, the increasing the number of diabetic patients and prolonged life expectancy lead increasing burden of Hyperglycemic Crisis. We should have plan to assist in managing diabetes patients.

Mortality rate of hyperglycemic crisis in Korean diabetes 2004-2013: A study based on National Health Insurance Database