NIH: Overall cancer mortality rate continues to decline

by Wesley Brown (wesbrocomm@gmail.com) 76 views 

The latest annual report from the National Institutes of Health shows that cancer death rates continued to decline in men, women and children across the U.S. from 1999 to 2016. Overall cancer incidence rates, or rates of new cancers, decreased in men from 2008 to 2015, after increasing from 1999 to 2008, and were stable in women from 1999 to 2015.

Those key details were part of the latest Annual Report to the Nation on the Status of Cancer, which is a collaborative effort among the NIH’s National Cancer Institute (NCI); the Centers for Disease Control and Prevention (CDC); the American Cancer Society (ACS); and the North American Association of Central Cancer Registries (NAACCR). The report appeared in the Journal of the National Cancer Institute on (Friday) May 30.

“We are encouraged by the fact that this year’s report continues to show declining cancer mortality for men, women, and children, as well as other indicators of progress,” said Betsy A. Kohler, executive director of NAACCR. “There are also several findings that highlight the importance of continued research and cancer prevention efforts.”

In the main report, from 2011 to 2015, the average annual incidence rate for all cancers combined was about 1.2 times higher among men than among women, and from 2012 to 2016, the average annual death rate among men (all ages) was 1.4 times the rate among women. However, in a special report where researchers looked only at men and women ages 20 to 49, they found that both incidence and death rates were higher among women.

The authors reported that, in the 20–49 age group from 2011 to 2015, the average annual incidence rate for all invasive cancers was 115.3 (per 100,000 people) among men, compared with 203.3 among women, with cancer incidence rates decreasing an average of 0.7% per year among men and increasing an average of 1.3% per year among women. During the period from 2012 to 2016, the average annual cancer death rate was 22.8 (per 100,000 people) among men and 27.1 among women in this age group.

The most common cancers and their incidence rates among women ages 20 to 49 were breast (73.2 per 100,000 people), thyroid (28.4), and melanoma of the skin (14.1), with breast cancer incidence far exceeding the incidence of any other cancer. The most common cancers among men ages 20 to 49 were colon and rectum (13.1), testis (10.7), and melanoma of the skin (9.8).

“The greater cancer burden among women than men ages 20 to 49 was a striking finding of this study,” said Elizabeth Ward, Ph.D., lead author of the study and a consultant at NAACCR. “The high burden of breast cancer relative to other cancers in this age group reinforces the importance of research on prevention, early detection, and treatment of breast cancer in younger women.”

In studying this age group, the authors also found that, from 2012 to 2016, death rates decreased 2.3% per year among men and 1.7% per year among women. The authors also reported in the special section that the incidence rates of in situ breast cancer and nonmalignant central nervous system tumors among women and men ages 20 to 49 are substantial.

They wrote that some of the most frequent malignant and nonmalignant tumors that occur in this age group may be associated with considerable long-term and late effects related to the disease or its treatment. The authors conclude that access to timely and high-quality treatment and survivorship care is important to improve health outcomes and quality of life for younger adults diagnosed with cancer.

This year’s report found that, among all ages combined, existing incidence and mortality trends for most types of cancer continue. Rates of new cases and deaths from lung, bladder, and larynx cancers continue to decrease as a result of long-term declines in tobacco smoking. In contrast, rates of new cases of cancers related to excess weight and physical inactivity—including uterine, post-menopausal breast, and colorectal (only in young adults)—have been increasing in recent decades.

Several notable changes in trends were observed in the report. After decades of increasing incidence, thyroid cancer incidence rates in women stabilized from 2013 to 2015. The authors wrote that this could be due to changes in diagnostic processes related to revisions in American Thyroid Association management guidelines for small thyroid nodules.

The report also shows rapid declines in death rates for melanoma of the skin in recent years. Death rates, which had been stable in men and decreasing slightly in women, showed an 8.5% decline per year from 2014 to 2016 in men and a 6.3% decline per year from 2013 to 2016 in women.

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