More Americans die of lung cancer than from the next two different cancers combined. Lung cancer is also one of the most challenging to treat.
One estimate states that fewer than 1 in 5 people diagnosed with it are alive five years later. But those numbers are just that: estimates. They don’t necessarily predict what will happen to you.
Understanding Survival Rates
These percentages are calculated by dividing the number of people who are alive after having a disease by the number of those who are diagnosed with the disease. So, for example, a five-year survival rate of 19% means that 19 out of 100 people diagnosed with a specific type of cancer live five years or longer.
The National Cancer Institute collects the data, and researchers analyze them in different ways. Their estimates may not reflect the latest breakthroughs in treatments that may improve your outlook. By definition, the current five-year survival rate is based on people who were diagnosed and treated at least five years ago.
You may also hear another term, relative survival rate. It’s a different statistic to gauge how much your cancer may shorten your life, compared to if you didn’t have it. A two-year relative survival rate of 70%, for example, means that people with the same type and level of cancer are 70% as likely to reach that milestone, compared to the general population. Because it’s adjusted for gender and age, the relative survival rate gives you an idea of how cancer may change what would have been your expected life span.
Survival doesn’t always equal a cure. Your cancer cells may be undetectable with tests, but still remain in your body. Or they might go away and come back.
Relative Survival Rates by Stages and Type
No one, including your doctors, can say for sure how long you may live after your diagnosis. But one big predictor is how early your cancer was caught. Unfortunately, lung cancer grows fast, but you may not notice any symptoms early on. That’s why some 40% of lung cancers aren’t discovered until the most serious stage: IV.
Also, younger people tend to live longer after their diagnosis than those who are older.
Survival Rates by Stages
Some doctors rely on a more detailed prognostic tool based on a staging system called tumor, nodes, and metastasis (TNM). These survival rates are the actual percentage of a sampling of people who were diagnosed with either NSCLC or SCLC and who were alive at two years and at five years.
- Stage IA1: 97% (two years); 90% (five years)
- Stage IA2: 94%; 85%
- Stage IA3: 92%; 80%
- Stage IB: 89%; 73%
- Stage IIA: 82%; 65%
- Stage IIB: 76%; 56%
- Stage IIIA: 65%; 41%
- Stage IIIB: 47%; 24%
- Stage IIIC: 30%; 12%
These survival rates for the most advanced lung cancer stages are estimated using a slightly different benchmark. The two- and five-year survival rates for all types of lung cancer are:
- Stage IVA: 23%; 10%
- Stage IVB: 10%; 0%
No two people with lung cancer are alike. You may respond differently to treatments.
The number of deaths from lung cancer in the U.S. has been steadily dropping. At the same time, the average survival times for those who are newly diagnosed have inched up.
Currently, researchers are running more than 1,500 clinical trials on lung cancer to test new therapies or new mixes of treatments.
