Table 143

Comparison of widely used survival analysis methods

Method

Assumption

Survivor/hazard function to be estimated

Nonparametric

Parametric (Accelerated failure time model)

Semiparametric

Kaplan-Meier method Life-table method

Exponential model

Weibull model Gompertz model Propotional hazard model

Event time is a random draw from the exponential distribution

Event time is a random draw from the Weibull distribution

Event time is a random draw from the Gompertz distribution

Hazard ratio is constant over time

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