(HealthDay News) — Worldwide, survival trends for cancer are generally increasing, although there is considerable global variation in survival rates, according to a study published online Jan. 30 in The Lancet.
Claudia Allemani, Ph.D., from the London School of Hygiene & Tropical Medicine in London, and colleagues examined worldwide cancer survival using data from CONCORD-3, which includes individual records for 37.5 million patients diagnosed with cancer during 2000 to 2014. Data were obtained from 322 population-based cancer registries in 71 countries or territories and included 18 cancers or groups of cancers.
The researchers found that estimated five-year net survival remained among the highest in the world in the United States and Canada; Australia and New Zealand; and Finland, Iceland, Norway, and Sweden for most cancers. Denmark was closing the survival gap with other Nordic countries for many cancers. Trends in survival are generally increasing, even for some more lethal cancers, with an increase of up to 5 percent for cancers of the liver, pancreas, and lung in some countries. The five-year survival for breast cancer for women diagnosed from 2010 to 2014 was 89.5 and 90.2 percent in Australia and the United States, respectively, although international differences persist (low of 66.1 percent in India).
“Governments must recognize population-based cancer registries as key policy tools that can be used to evaluate both the impact of cancer prevention strategies and the effectiveness of health systems,” the authors write.