No, the survival numbers indicate statistical estimates (probabilities) for the median survival for other patients who received that treatment. The survival numbers should only be used as general information for three reasons:
First, although oncologists who administered the treatment calculated the survival number for the patients who received the treatment, the number is based on statistical probabilities. This means that these are estimates only.
Second, the numbers are usually median figures. This means that half the patients were on one side of that number and half were on the other side. The people on the far side of the line may survive for many years. For example, if one patient lived 1 month, a second lived 2 months and the third lived 18 months than the median survival would be 2 months. The average (mean) survival, however, would be 7 months.
Third, these numbers cannot, and are not intended or designed to, predict your specific prognosis. Every patient is different and your prognosis will depend on your own unique combination of many variables including your general state of health, age, diagnosis, cancer type and grade, whether a cancer was completely removed by surgery (fully resectable), prior treatments, and the extent of metastasis (if any).