Noncommunicable diseases, or NCDs, are often called chronic diseases because they last a long time. They are the result of a complex mix of genetic, physiological, environmental, and behavioral factors. While they may not grab the headlines like a pandemic, they are responsible for the vast majority of the world’s deaths and pose a massive threat to global development.
The Devastating Numbers: A Global Toll
In 2021, NCDs were the leading cause of death worldwide, killing at least 43 million people. That’s a staggering 75% of all non-pandemic-related deaths.
The Premature Death Crisis
It’s a common misconception that NCDs only affect the elderly. In reality, 18 million people died from an NCD before the age of 70 in 2021. Even more troubling: 82% of these premature deaths occur in low- and middle-income countries (LMICs). The poorest and most vulnerable populations are disproportionately bearing the burden of this crisis. Overall, three-quarters (73%) of all NCD deaths happen in LMICs.
The Four Major Killers
Just four groups of diseases are responsible for most NCD deaths:
- Cardiovascular Diseases (heart attacks and stroke): The leading killer, accounting for 19 million deaths.
- Cancers: Responsible for 10 million deaths.
- Chronic Respiratory Diseases (like COPD and asthma): Caused 4 million deaths.
- Diabetes (including related kidney disease deaths): Killed over 2 million people.
These four groups alone account for 80% of all premature NCD deaths.
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What Drives the Risk?
NCDs are largely driven by a handful of preventable factors that impact people of all ages—children, adults, and the elderly.
Behavioral Risk Factors
These are the modifiable habits and exposures that increase your risk:
- Tobacco use (including exposure to second-hand smoke).
- Unhealthy diets (too much salt, sugar, and fat).
- Harmful use of alcohol.
- Insufficient physical activity.
The social and physical environments we live in play a massive role in driving these unhealthy behaviors.
Metabolic and Environmental Risks
Unhealthy lifestyles often lead to key metabolic changes that significantly increase NCD risk:
- Raised blood pressure (hypertension)—the leading metabolic risk factor globally.
- Overweight or obesity.
- High blood glucose levels (a precursor to diabetes).
- Abnormal blood lipids (like high cholesterol).
We also can’t ignore the environment. Air pollution (both indoor and outdoor) is a major contributor, linked to 5.6 million NCD deaths globally, including cases of stroke, heart disease, and lung cancer.
Prevention and Control: How We Fight Back
The fight against NCDs is not just a medical problem; it’s a societal one that requires a comprehensive, whole-of-government approach.
Investing in Prevention
The most effective way to control NCDs is to focus on reducing the risk factors. Low-cost, high-impact policy solutions exist, such as taxing tobacco and sugary drinks, promoting active transport, and regulating food marketing. Achieving this requires collaboration across all sectors—health, finance, transport, education, and agriculture.
Strengthening Healthcare
Early detection and timely treatment are vital. We must invest in better NCD management, including:
- Screening and early detection programs.
- Affordable treatment for chronic conditions.
- Access to essential palliative care for those in need.
Evidence shows that intervening early is an excellent economic investment, as it reduces the need for much more expensive treatment down the line. Strengthening primary healthcare systems to deliver these essential NCD interventions is critical for achieving universal access.
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The Socioeconomic Impact
The rising tide of NCDs threatens global progress, particularly the 2030 Agenda for Sustainable Development. NCDs are intrinsically linked to poverty. The financial burden of healthcare costs can push vulnerable families into destitution, and socially disadvantaged people get sicker and die sooner due to limited access to services.
To combat this, countries worldwide have committed to Sustainable Development Goal (SDG) target 3.4: to reduce premature mortality from the four main NCDs by one-third by 2030. The World Health Organization (WHO) is leading the charge with a Global Action Plan to accelerate progress toward this crucial target.
The crisis of NCDs is a serious challenge, but with targeted investment, multisector collaboration, and a focus on prevention and primary care, it is a battle we can win.
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