Previous studies have shown married people generally have better health and live longer than single people, as they tend not to smoke and drink as heavily, and have better mental health. The researchers at the University of Oslo say this is likely to be a factor in cancer death rates.
They also suggested that married people are probably diagnosed earlier as they tend to visit the doctor more and may comply better with treatment as they have a spouse to support them.
Mortality rates for unmarried men have gone up by 3.4 per cent every decade compared with those who are married.
For divorced and widowed men, the death rate is slightly higher than married men but not as high as bachelors.
Dr Safia Danovi, from Cancer Research UK, said: "Cancer survival is a complex issue and there may be many reasons for these findings.
"Early diagnosis is still key to beating cancer so people should visit their doctor as soon as they notice a change that is unusual for them, whether they're married or not."
- DAILY MAIL