The study showed that the new test is successful at helping to find lung cancer before any symptoms show in people who are at increased risk.
The blood test is very good at making sure that no cases of lung cancer are missed. Out of a hundred people who had a negative result on their blood test, ninety-nine did not develop lung cancer in the two-year follow-up period:
However, a positive test result does not always mean a diagnosis of lung cancer. Instead, it can be seen as a reason to do further tests:
In other words, out of every thirty-three people who tested positively, one person had lung cancer diagnosed within two years (1 in 33). This number is similar to the breast cancer screening programme (1 in 26).