Tuesday, June 7, 2011

One in two teenagers suffers from mental disorders

One in every two adolescents globally suffers from neuro-psychiatric disorders. According to the Global Burden Of Disease In Young People aged 10-24 years, published in "Lancet Neurology" on Tuesday, mental disorders like depression, alcohol use, schizophrenia and bipolar disorder comprises 45% of the disease burden among young people in this age group.

The other two primary causes of disability worldwide were unintentional injuries (12% -- mainly road traffic accidents) and infectious and parasitic diseases (10%). This is the first study that provides a comprehensive picture of the global causes of disability in adolescence and the main risk factors that emerge in these years and cause disease in later life.

Young people aged 10–24 years represent 27% (more than 1.8 billion) of the world's population and their number is set to rise to about 2 billion by 2032. In this study, Fiona Gore from WHO, Geneva, estimates the cause-specific disability-adjusted life-years (DALYs) for young people aged 10–24 years. DALYs are a combined measure of Years of Life Lost due to premature deaths (YLLs) and Years Lost due to Disability (YLDs). One DALY represents the loss of the equivalent of one year of full health.

The finding shows that the total DALYs for people aged 10–24 years were about 236 million, representing 15.5% of total DALYs for all age groups. Across all regions, the disease burden was 12% higher in girls than in boys aged 15–19 years.

The main global risk factors for future disability in all age groups (0-80) are underweight, unsafe sex, alcohol use, unclean water, poor sanitation and hygiene.

In contrast, the research showed that the main health risks emerging during adolescence were alcohol use, unsafe sex, iron deficiency and lack of contraception.

"The main risk factors for incident DALYs in 10–24-year-olds were alcohol (7% of DALYs), unsafe sex (4%), iron deficiency (3%), lack of contraception (2%), and illicit drug use (2%)," the authors said.
The authors who studied changes in DALYs in early adolescence (10–14 years), late adolescence (15–19 years), and young adulthood (20–24 years), said, "The disease burden arising in early adolescence from major risk factors is low. However, rates rise sharply in late adolescence and early adulthood for both alcohol use and unsafe sex. For other risk factors that commonly start in adolescence such as tobacco use, low physical activity, high blood pressure, and overweight and obesity, their contribution to disease becomes apparent only in mid-to-late adulthood."

The 10 main causes of worldwide disability in both sexes (10-24 years):
* Unipolar depressive disorders
* Road traffic accidents
* Schizophrenia
* Bipolar Disorder
* Violence
* Alcohol abuse
* HIV/AIDS
* Self-inflicted injuries
* TB
* Lower respiratory infections

The 10 main causes of worldwide disability in both sexes (10-14 years):
* Unipolar depressive disorders
* Lower respiratory infections
* Road Traffic accidents
* Asthma
* Refractive errors
* Iron deficiency anaemia
* Falls
* Migraine
* Drowning
* Diarrhoeal diseases

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