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Wednesday, October 20, 2010

Malaria deaths in India 13 times more than thought - study

Malaria kills more than 200,000 people in India each year, 13 times higher than UN estimates, according to a paper published by The Lancet.

The UN's World Health Organisation (WHO) says that the malarial death toll in India, the most populous country where the disease is endemic, is around 15,000 annually, comprising 5,000 children and 10,000 adults.

But the new study says the WHO's reporting method is flawed, as it depends indirectly on patients who have been diagnosed by a doctor.

Many deaths in India occur at home, rather than in a hospital or a clinic, which means the underlying cause of many malaria fatalities is likely to be misattributed, it says.

Investigators sent out field workers to 6,671 randomly-selected areas of India to interview relatives or careworkers of 122,000 people who had died between 2001 and 2003.

The field workers sent back a half-page report on each case as well as answers to specific questions which were asked if the individual had died of a fever.

This data was then analysed separately by two physicians, who each gave an independent opinion of the underlying cause of death. A review board adjudicated in cases where there was a dispute.

The doctors determined that 3.6 per cent of deaths they attributed among people aged one month to 70 years occurred from malaria. Ninety per cent of these happened in rural areas and 86 per cent occurred outside of a health-care facility.

The fatality estimates coincided geographically with local transmission rates compiled by the Indian malarial control programme, they found.

Extrapolated nationwide, malaria kills 205,000 people a year before the age of 70, comprising 55,000 in early childhood, 30,000 at ages five to 14 and 120,000 at ages 15 to 69, according to the report.

The authors say the WHO may also hugely underestimate the toll of malaria in other countries, which would have big repercussions for health policy.

"If WHO estimates of malaria deaths in India or among adults worldwide are likely to be serious underestimates, this could substantially change disease control strategies, particularly in the rural parts of states with high malaria burden."

According to the WHO's website, "nearly one million" people died from malaria in 2008, most of them African children.

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