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Chronic lymphocytic leukemia

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Survival statistics for chronic lymphocytic leukemia

Survival statistics for chronic lymphocytic leukemia (CLL) are very general estimates and must be interpreted very carefully. Because these statistics are based on the experience of groups of people, they cannot be used to predict a particular person’s chances of survival.

There are many different ways to measure and report cancer survival statistics. Your doctor can explain the statistics for CLL and what they mean to you.

Median survival

Survival for CLL is reported as median survival. Median survival is the period of time (usually months or years) at which half of the people with cancer are still alive. The other half will live less than this amount of time.

The median survival varies with each stage of CLL. The stages of CLL are divided into levels of risk that indicate how likely the disease is to worsen. Age, the pattern of lymphocytes in the bone marrow, chromosome changes and other characteristics of the CLL can also affect survival.

Staging systemStageLevel of riskMedian survival




more than 12.5 years

I and II


7 years

III and IV


1.5 years




More than 10 years



5–7 years



2–3 years

Questions about survival

If you have CLL, talk to your doctor about your prognosis. Prognosis depends on many factors, including:

  • your medical history
  • type of cancer
  • stage
  • characteristics of the cancer
  • treatments chosen
  • response to treatment

Only a doctor familiar with these factors can put all of this information together with survival statistics to arrive at a prognosis.


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