Data come from the 1991 Arizona cardiovascular patient files. A subset of the fields was selected to model the differential length of stay for patients entering the hospital to receive one of two standard cardiovascular procedures: CABG and PTCA. CABG is the standard acronym for Coronary Artery Bypass Graft, where the flow of blood in a diseased or blocked coronary artery or vein has been grafted to bypass the diseased sections. PTCA, or Percutaneous Transluminal Coronary Angioplasty, is a method of placing a balloon in a blocked coronary artery to open it to blood flow. It is a much less severe method of treatment for those having coronary blockage, with a corresponding reduction in risk.
azproazpro
A data frame with 3589 observations on the following 6 variables:
length of hospital stay
1=CABG; 0=PTCA
1=Male; 0=female
1=Urgent/Emerg; 0=elective (type of admission)
1=Age>75; 0=Age<=75
encrypted facility code (string)
COUNT R package.