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Computing a Cox model

We have a dataset of lung cancer patients. We want to know if their performance score (variable performance) is associated with their survival time. The performance score measures how well a patient can perform usual daily activities (bad=0, good=100).

The survival package and the dat dataset are already loaded for you.

This exercise is part of the course

Survival Analysis in R

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Hands-on interactive exercise

Have a go at this exercise by completing this sample code.

# Compute Cox model
cxmod <- ___(Surv(time, status) ~ ___, data = dat)

# Show model coefficient
coef(___)
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