Just one in 20 people worldwide (4.3 percent) had no health problems in 2013, with a third of the world's population (2.3 billion individuals) experiencing more than five ailments, claimed the Global Burden of Disease Study (GBD) 2013 published in the prestigious journal The Lancet.

Moreover, the research shows that worldwide the proportion of lost years of healthy life (disability-adjusted life years) due to illness (rather than death) rose from around a fifth (21 percent) in 1990 to almost a third (31 percent) in 2013.

"In 2013, low back pain and major depression ranked among the top 10 greatest contributors to disability in every country, causing more health loss than diabetes, chronic obstructive pulmonary disease and asthma combined," the study said.

Low back pain, depression, iron-deficiency anaemia, neck pain and age-related hearing loss resulted in the largest overall health loss worldwide in 1990 and 2013.

In 2013, musculoskeletal disorders (low back pain, neck pain and arthritis) and mental and substance abuse disorders (depression, anxiety, and drug and alcohol use disorders) accounted for almost half of all health loss worldwide.

"The fact that mortality is declining faster than non-fatal disease and injury prevalence is further evidence of the importance of paying attention to the rising health loss from these leading causes of disability, and not simply focusing on reducing mortality," said Theo Vos, lead author and professor of global health at University of Washington.



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