Mortality in Teens, Young Adults Passes Childhood Mortality

By Moon, Mary Ann | Clinical Psychiatry News, April 2011 | Go to article overview

Mortality in Teens, Young Adults Passes Childhood Mortality


Moon, Mary Ann, Clinical Psychiatry News


Worldwide, mortality in adolescents and young adults has overtaken that in children aged 1 -4 years, except for a few very-low-income countries, according to a report.

In particular, mortality among young men aged 15-24 years is now two to three times higher than that in young boys, said Russell M. Viner, Ph.D., of the University College London Institute of Child Health and his associates.

This represents a reversal of the historical mortality pattern, and is driven largely by two trends: decreases in both communicable and noncommunicable childhood diseases, and an upsurge in violence- and injury-related deaths in young men. For the first time, children aged 1-4 years now have lower mortality than young men and equivalent mortality to young women, the investigators said.

Mortality among women aged 15-24 years has always been relatively high and continues to be so, because of the excess mortality related to pregnancy and childbirth in this age group.

Research concerning mortality in later childhood, adolescence, and young adulthood has been neglected," compared with research in infancy and later adulthood, in part because of "the assumption that this period is the healthiest time of life," Dr. Viner and his colleagues said. "However, during the past 50 years, global social, economic, and political changes have adversely affected patterns of health and disease in adolescents and young adults."

The investigators analyzed information in the World Health Organization's mortality database in what they described as the first international study to examine trends in cause-specific mortality in people aged 1-24 years residing in 50 high-, middle-, low-, and very-low-income countries between 1955 and 2004.

Importantly, because of inaccurate or incomplete data during this period, some very-low-income countries in Africa and Asia could not be included in the study, nor could India and China, the two countries with the largest populations of adolescents and young adults. The study findings therefore cannot be generalized to these countries, the researchers noted.

The study population comprised 436 million young people, representing 15% of the global population in this age group.

In the 1950s, mortality at ages 1-4 years greatly exceeded that of all other age groups in all regions studied. But during the ensuing 50 years, mortality among children aged 1-9 years declined by a dramatic 80%-93%, largely because of a steep decrease in communicable diseases--a decline that was as high as 50-fold in some areas. Mortality related to noncommunicable juvenile diseases such as asthma, diabetes, and cardiovascular disorders also declined.

Yearly decreases in mortality were large, at approximately 2%, among children aged 5-14 years. In contrast, yearly decreases were much lower, at approximately 0.8%, in males aged 15-24 years. Yearly decreases among young women were intermediate between these two extremes, at approximately 1.5%.

Trends in injury-related deaths also differed greatly between children on the one hand and adolescents combined with young adults on the other. …

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