IAI CS2 Practice Questions - IAI Subject CS2 Risk Modelling And Survival Analysis Exam

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In the Cox proportional hazards model, the hazard is written lambda(t; z) = lambda_0(t) exp(beta^T z). What does the term lambda_0(t) represent?

The baseline hazard, common to all individuals when all covariates are zero The cumulative hazard for the highest-risk individual A covariate-specific multiplier that varies by individual The probability of survival to time t

Correct Answer:

The baseline hazard, common to all individuals when all covariates are zero

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