What are the Assumptions in the Cox Proportional Hazards Model?
The Cox Proportional Hazards Model assumes:
1. Proportional Hazards: The hazard ratios between groups are constant over time. 2. Linearity: The relationship between the covariates and the log hazard is linear. 3. Independence: The survival times of different individuals are independent.
Violations of these assumptions can lead to biased estimates and incorrect conclusions.
