On the Statistic tab in a Survival session, you must choose one of the following survival measures to calculate survival. If you are unsure of the appropriate survival measure to use for your analysis, see Determining the Appropriate Cancer Survival Measure.

Choose between the Actuarial and Kaplan-Meier methods of calculating survival. Additionally indicate whether to use Period Survival. If doing Relative Survival or Crude Probability of Death Using Expected Survival, you must also choose one of the four methods of calculating Cumulative Expected Survival.

Observed Survival Only

Observed survival is an estimate of the probability of surviving all causes of death for a specified time interval calculated from the cohort of cancer cases.

Relative Survival

Relative survival is a net survival measure representing cancer survival in the absence of other causes of death.

Cause-Specific Survival

Cause-specific survival is a net survival measure representing survival of a specified cause of death in the absence of other causes of death.

Crude Probability of Death Using Expected Survival

The crude probability of death measures the mortality patterns actually experienced in a cohort of cancer patients on which many possible causes of death are acting simultaneously. This option estimates the probability of dying from cancer and dying from other causes in a cohort of cancer patients. The measure uses expected survival (obtained from the expected life tables) to estimate the probability of dying from other causes in each interval.

Crude Probability of Death Using Cause of Death Information

The crude probability of death measures the mortality patterns actually experienced in a cohort of cancer patients on which many possible causes of death are acting simultaneously. This option estimates the probability of dying from cancer and dying from other causes in a cohort of cancer patients. Cause of death information is used to identify those individuals that have died from cancer.

If you choose to calculate the observed survival only, or net survival in absence of other causes of death, you will have the option to Age Standardize. If the Age Standardize box is checked, you must select a Standard Population and an Age Variable to use for standardizing.

If you choose to calculate relative survival, or crude probability of death using expected survival, you must also select an expected survival table. If you choose cause-specific survival, or crude probability of death using cause of death information, a definition of cause of death is required.