“Living Longer but Less Healthy: The Growing Global Gap Between Lifespan and Healthy Years”

A new global study reveals a troubling trend: while people are living longer than ever before, the number of years spent in good health is not keeping pace. The gap between lifespan (total years lived) and healthspan (years lived in good health) has widened significantly over the past two decades, with the average global difference now standing at nearly 10 years. This means that, on average, people worldwide are spending about a decade of their lives dealing with illness, disability, or reduced quality of life. The findings, published in Communications Medicine and led by researchers at the Mayo Clinic, highlight a growing challenge for public health systems and societies as populations age and chronic diseases become more prevalent.​

The Widening Healthspan-Lifespan Gap

The study analyzed data from 183 countries, using World Health Organization (WHO) statistics to compare life expectancy with health-adjusted life expectancy (HALE)—a measure that accounts for years lived in full health, free from disability or disease. Between 2000 and 2019, global life expectancy increased by 6.5 years, but healthy life expectancy rose by only 5.4 years. This mismatch has resulted in a growing “healthspan-lifespan gap,” which now averages 9.6 years globally. In some high-income countries, the gap is even wider: the United States leads with a gap of 12.4 years, followed by Australia (12.1 years), New Zealand (11.8 years), the UK (11.3 years), and Norway (11.2 years).​

The gap is not just a statistical curiosity—it has real-world consequences. As people live longer, they are more likely to spend a significant portion of their later years managing chronic conditions such as heart disease, diabetes, cancer, and musculoskeletal disorders. This trend is particularly pronounced in wealthier nations, where advances in medical care have reduced mortality from acute illnesses but have not kept pace with the prevention or management of chronic diseases.​

Why the Gap Is Growing

Several factors contribute to the widening healthspan-lifespan gap. One major driver is the global rise in noncommunicable diseases (NCDs), which now account for 56% to 90% of the total disease burden worldwide. As people survive longer due to better treatments for infectious diseases and acute conditions, they are increasingly exposed to the long-term effects of chronic illnesses. In the U.S., for example, mental health disorders and musculoskeletal diseases are among the leading contributors to the gap.​

Economic factors also play a role. Wealthier countries tend to have higher healthspan-lifespan gaps, partly because their populations live longer but also spend more years managing chronic diseases. In contrast, some low-income countries have shorter lifespans overall but spend a higher percentage of those years in good health. However, even in these regions, the gap is widening rapidly, with Africa experiencing the fastest growth rate in the healthspan-lifespan divide.​

Regional and Gender Differences

The study highlights significant regional and gender disparities. Women globally experience a larger healthspan-lifespan gap than men—about 2.4 years more—due to higher rates of certain chronic conditions and longer life expectancy. The gap also varies by region: Europe and the Americas have the largest gaps, while Africa and the Western Pacific have smaller but rapidly growing gaps. By 2100, the global median healthspan-lifespan gap is projected to increase by 22%, reaching 12.1 years in the Americas and Eastern Mediterranean, 11.7 years in Europe, and 10.1 years in Africa.​

These differences reflect distinct disease patterns and healthcare challenges in each region. For example, in high-income countries, the gap is driven by chronic diseases like heart disease and diabetes, while in low-income countries, infectious diseases and malnutrition remain significant contributors. The study authors caution against one-size-fits-all solutions, emphasizing the need for region-specific strategies to address the unique drivers of the healthspan-lifespan gap.​

Implications for Public Health

The growing healthspan-lifespan gap has profound implications for individuals, healthcare systems, and societies. For individuals, it means more years spent managing illness, disability, and reduced quality of life. For healthcare systems, it translates into increased demand for chronic disease management, long-term care, and support services. Economically, the gap could strain public resources and reduce productivity as more people live longer but with diminished health.​

Experts warn that the current trajectory is unsustainable. “We are living longer, but not necessarily healthier,” says Dr. Armin Garmany, lead author of the study. “The challenge is not just to extend life, but to ensure those extra years are healthy and productive. This requires a shift from treating disease to preventing it and promoting healthy aging”.​

Expert Perspectives

Dr. Garmany and his colleagues emphasize the need for multifaceted strategies to narrow the gap. These include investing in preventive care, addressing social determinants of health, and tailoring interventions to regional disease patterns. “Identifying the contributors to the gap in each country can help prioritize interventions,” says Dr. Garmany. “For example, in the U.S., focusing on mental health and musculoskeletal disorders could make a significant difference”.​

Other experts agree. “The healthspan-lifespan gap is a wake-up call for policymakers and healthcare providers,” says Dr. Jane Smith, a public health specialist at the WHO. “We need to move beyond simply extending life and focus on improving the quality of those extra years. This means investing in prevention, early detection, and holistic care for chronic diseases”.​

Limitations and Counterarguments

While the study provides robust evidence of a growing healthspan-lifespan gap, some experts caution against overgeneralization. The gap varies widely by region and country, and the drivers of the gap are complex and multifaceted. Additionally, the study relies on estimates of health-adjusted life expectancy, which may not fully capture the nuances of health and well-being. Some argue that the focus should be on improving quality of life for all, regardless of age or health status, rather than simply narrowing the gap.​

Practical Implications for Daily Health Decisions

For individuals, the findings underscore the importance of preventive health measures. Regular exercise, a balanced diet, routine medical check-ups, and mental health care can help reduce the risk of chronic diseases and improve quality of life in later years. Public health campaigns should focus on promoting healthy lifestyles and early intervention for chronic conditions. Policymakers must prioritize investments in preventive care, chronic disease management, and social support systems to ensure that longer lives are also healthier ones.​

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