Introduction
Tracking patients who are readmitting to a hospital after a hospital stay is one category of data which is used to evaluate the quality of hospital care. Patients with \cite{v7qtwa} have high rates of readmission compared with patients without diabetes, according to a pilot study published in Clinical diabetes and Endocrinology. In the first study, the readmission rate was 26% in patients with diabetes vs 22% in patients without diabetes " US has the highest prevalence of diabetes among all developed countries across the world"- \cite{federation}. Diabetes is a disease that occurs when your blood glucose, also called blood sugar, is too high. Blood glucose is your main source of energy and comes from the food you eat. Glucose comes from the foods you eat. Insulin is a hormone that helps the glucose get into your cells to give them energy.
We have \cite{set} that represents 10 years (1999-2008) of clinical care at 130 US hospitals, which has 50 features and 101766 records of patients and hospital outcomes. Information was extracted from the database for encounters that satisfied the criteria's such as inpatient encounter (a hospital admission), diabetic encounter( one during which any kind of diabetes was entered to the system as a diagnosis), length of stay was at least 1 day and at most 14 days, laboratory tests performed during the encounter, medications were administered during the encounter.
The data also contains such attributes as patient number, race, gender, age, admission type, time in hospital, medical specialty of admitting physician, number of lab test performed, HbA1c test result, diagnosis, number of medication, diabetic medications, number of outpatient, inpatient, and emergency visits in the year before the hospitalization, etc.