Mortality was doubled in patients diagnosed over the age of 40, the study found. But, those diagnosed after 1987 were less likely to die during follow-up than men diagnosed earlier, possibly due to the introduction of a certain kind of chemotherapy about 10 years earlier.
Several factors may account for the age-related mortality difference, including the fact that many older patients are often not treated with the same intensity as younger patients, the researchers said.
"In a cancer that is so highly curable, any influence that confers an increased risk of disease-specific mortality must be identified, and interventional strategies adopted," they said.