The amount of anginal coronary artery disease chest pain is

The amount of anginal (coronary artery disease) chest pain is categorized by the Cana- dian Heart Classification from mild (class I) to severe (class IV).

Use R with prop.trend.test and glm for logistic regression.

Anginal Pain Classification IV Surgical Mortality Yes No % surgical mortality 2.4 1.4 1.8 6 194759 242 1371 2494 1314 X231.19 p=.TE-7

Solution

> library(stats)
> yes<-c(6,19,47,59)
> no<-c(242,1371,2494,1314)
> score<-c(1:4)

>total<-yes+no

> prop.trend.test(yes,total,score)

This gives result

Chi-squared Test for Trend in Proportions

data: yes out of total ,
using scores: 1 2 3 4
X-squared = 18.829, df = 1, p-value = 1.429e-05

Since P-value is very less we reject the null hypothesis.