Extraction from an output

Hello,
Would you tell my how to extract a result from a test - it's justified because I need to run this test many times. Here is an  example from authors' test:

library("coin")
lungtumor <- data.frame(dose = rep(c(0, 1, 2), c(40, 50, 48)), tumor = c(rep(c(0, 1), c(38, 2)), rep(c(0, 1), c(43, 7)), rep(c(0, 1), c(33, 15))))
ca.test<-independence_test(tumor ~ dose, data = lungtumor, teststat = "quad")
ca.test

Asymptotic General Independence Test

data:  tumor by dose 
chi-squared = 10.6381, df = 1, p-value = 0.001108


How to use ca.test and extract p-value and chi-squared.

Robert