Leading causes of death worldwide
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Noncommunicable Diseases (NCDs) as Leading Causes of Death Worldwide
Noncommunicable diseases (NCDs) are the primary causes of death globally, accounting for about 68% of all deaths each year. The four main NCDs responsible for this high mortality are cardiovascular diseases, cancers, diabetes, and chronic respiratory diseases. These conditions are especially deadly in low- and middle-income countries, where 74% of NCD deaths occur, often due to challenging social and economic conditions. Each year, 16 million people die prematurely (before age 70) from NCDs, highlighting the urgent need for prevention and control strategies Fikri2018Fikri2018.
Cardiovascular Diseases: The Top Global Killer
Cardiovascular diseases (CVDs), including ischaemic heart disease and stroke, are the leading cause of death worldwide. In 2021, CVDs caused 20.5 million deaths, with about 80% of these occurring in low- and middle-income countries. Ischaemic heart disease alone accounted for 7.2 million deaths in 2008, making up 12.7% of total global mortality. The highest CVD mortality rates are found in Central Europe, Eastern Europe, and Central Asia. Raised blood pressure is the leading risk factor for CVD deaths globally Finegold2013Di Cesare2024Murray1997+1 MORE.
Cancer: A Growing Global Threat
Cancer is now one of the top two causes of premature death in most countries, and its importance is increasing. In 2018, there were an estimated 18.1 million new cancer cases and 9.6 million cancer deaths worldwide. Lung cancer is the leading cause of cancer death globally, followed by colorectal, stomach, and liver cancers. For women, breast cancer is the most commonly diagnosed and the leading cause of cancer death. The burden of cancer is rising, especially in developing countries, where health systems may struggle to provide adequate care Bray2021Bray2018Fitzmaurice2015+1 MORE.
Other Major Causes of Death: Diabetes, Chronic Respiratory Diseases, and Injuries
Diabetes and chronic respiratory diseases are also significant contributors to global mortality. Diabetes caused 1.3 million deaths in 2010, double the number from 1990. Chronic respiratory diseases, such as chronic obstructive pulmonary disease (COPD), are among the top killers, particularly in regions with high rates of smoking and air pollution. Injuries, including road-traffic accidents, account for about 10% of global deaths and are often overlooked in public health strategies Fikri2018Murray1997Lozano2012.
Shifting Patterns: From Infectious to Noncommunicable Diseases
Historically, infectious diseases, maternal, perinatal, and nutritional disorders were the leading causes of death, especially among children in developing countries. However, as countries undergo epidemiological transitions, NCDs have become the dominant causes of death, even in regions where infectious diseases once prevailed. This shift is particularly evident in countries like China, where cancer and cardiovascular diseases now account for a large share of mortality Bray2021Murray1997Lozano2012+1 MORE.
Regional Differences and the Impact on Low- and Middle-Income Countries
The burden of leading causes of death is not uniform across the world. Low- and middle-income countries bear a disproportionate share of deaths from NCDs, CVDs, and cancer. For example, China accounts for 24% of new cancer cases and 30% of cancer deaths globally. In these countries, the combination of rising NCD rates and limited healthcare resources creates a significant public health challenge Fikri2018Fikri2018Finegold2013+2 MORE.
Conclusion
The leading causes of death worldwide are now dominated by noncommunicable diseases, especially cardiovascular diseases and cancer. These conditions are responsible for the majority of global deaths, with the highest impact seen in low- and middle-income countries. Addressing these leading causes requires comprehensive prevention, early detection, and effective management strategies, particularly in regions facing the greatest burden.
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Scaling up action on the prevention and control of noncommunicable diseases in the WHO Eastern Mediterranean Region.
Noncommunicable diseases (NCDs) are the leading cause of death worldwide, with cardiovascular diseases, cancers, diabetes, and chronic respiratory diseases being the four main killers, and their prevention and control is crucial for reducing premature death in low and middle-income countries.
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