survival
Cox proportional hazards
Model time-to-event outcomes with covariates.
Requirements
- time
- event indicator
- predictor(s)
Avoid when
- severe proportional-hazards violations
Formula
h(t|x) = h₀(t) exp(xᵀβ)
Interpretation
Exponentiated coefficients are hazard ratios.
Worked example
Estimate adjusted hazard ratios for treatment, age, and disease stage.
Open example datasets