azdrg112

Description

The data set relates to the hospital length of stay for patients having a CABG or PTCA (typel) heart procedure. The data comes from the 1995 Arizona Medicare data for DRG (Diagnostic Related Group) 112. Other predictors include gender(1=female) and age75 (1-age 75+). Type is labeled as 1=emergency or urgent admission; 0= elective. Length of stay (los) ranges from 1 to 53 days.

Usage

data(azdrg112)

Format

A data frame with 1,798 observations on the following 4 variables.

los

hospital length of stay: 1-53 days

gender

1=male; 0=female

type1

1=emergency/urgent admission; 0=elective admission

age75

1=age>75; 0=age<=75

Details

azdrg112 is saved as a data frame. Count models typically use los as response variable. 0 counts are not included

Source

DRG 112 data from the 1995 Arizona Medicare (MedPar) State files

References

Hilbe, Joseph M (2007, 2011), Negative Binomial Regression, Cambridge University Press

Examples

data(azdrg112)
glmazp <- glm(los ~ type1 + gender + age75, family=poisson, data=azdrg112)
summary(glmazp)
exp(coef(glmazp))
library(MASS)
glmaznb <- glm.nb(los ~ type1 + gender + age75, data=azdrg112)
summary(glmaznb)
exp(coef(glmaznb))