HEART DISEASE DATABASES General: The data set is a combination of 4 databases concerning heart disease diagnosis. The data was collected from the four following locations: 1. Cleveland Clinic Foundation 2. Hungarian Institute of Cardiology, Budapest 3. V.A. Medical Center, Long Beach, CA 4. University Hospital, Zurich, Switzerland The authors of the databases have requested: ...that any publications resulting from the use of the data include the names of the principal investigator responsible for the data collection at each institution. They would be: 1. Hungarian Institute of Cardiology. Budapest: Andras Janosi, M.D. 2. University Hospital, Zurich, Switzerland: William Steinbrunn, M.D. 3. University Hospital, Basel, Switzerland: Matthias Pfisterer, M.D. 4. V.A. Medical Center, Long Beach and Cleveland Clinic Foundation: Robert Detrano, M.D., Ph.D. Relevant Information: The original database contained 76 attributes, but all published experiments refer to using a subset of 14 of them. The "goal" (last) field refers to the presence of heart disease in the patient. It is integer valued from 0 (no presence) to 4. Experiments have concentrated on simply attempting to distinguish presence (values 1,2,3,4) from absence (value 0), but in the practical assignement the goal is to predict the actual value. Attribute Information: #1 age age in years #2 sex sex (1 = male; 0 = female) #3 cp chest pain type Value 1: typical angina Value 2: atypical angina Value 3: non-anginal pain Value 4: asymptomatic #4 trestbps resting blood pressure (in mm Hg on admission to the hospital) #5 chol serum cholestoral in mg/dl #6 fbs (fasting blood sugar > 120 mg/dl) (1 = true; 0 = false) #7 restecg resting electrocardiographic results Value 0: normal Value 1: having ST-T wave abnormality (T wave inversions and/or ST elevation or depression of > 0.05 mV) Value 2: showing probable or definite left ventricular hypertrophy by Estes' criteria #8 thalach maximum heart rate achieved #9 exang exercise induced angina (1 = yes; 0 = no) #10 oldpeak ST depression induced by exercise relative to rest #11 slope the slope of the peak exercise ST segment Value 1: upsloping Value 2: flat Value 3: downsloping #12 ca number of major vessels (0-3) colored by flourosopy #13 thal 3 = normal; 6 = fixed defect; 7 = reversable defect #14 num diagnosis of heart disease (angiographic disease status) Value 0: < 50% diameter narrowing Value 1: > 50% diameter narrowing (in any major vessel)