About 1 in 7 men will be diagnosed with prostate cancer.
It can be difficult to know if the disease will stay contained or spread, but there may be a way to predict which patients are more at risk.
More than 200 men were treated by researchers for prostate cancer.
Patients were more likely to die from the disease if they had higher PSA levels after radiation and hormone therapy.
Experts say quickly identifying men who need more aggressive treatment could greatly improve their odds of survival.
