observed survival


Observed survival is the percentage of people with a particular cancer who are alive at a certain point in time after their diagnosis.

For example, a 5-year observed survival of 70% means that, on average, people have a 7 in 10 chance of being alive 5 years after their diagnosis.

Observed survival does not consider the cause of death, so the people who are not alive 5 years after diagnosis could have died from cancer or from another cause.

Observed survival is also called overall survival.

Medical disclaimer

The information that the Canadian Cancer Society provides does not replace your relationship with your doctor. The information is for your general use, so be sure to talk to a qualified healthcare professional before making medical decisions or if you have questions about your health.

We do our best to make sure that the information we provide is accurate and reliable but cannot guarantee that it is error-free or complete.

The Canadian Cancer Society is not responsible for the quality of the information or services provided by other organizations and mentioned on cancer.ca, nor do we endorse any service, product, treatment or therapy.

1-888-939-3333 | cancer.ca | © 2024 Canadian Cancer Society