In the rarefied realm of global health metrics, a disturbing trend has emerged. A new study published in The Lancet Public Health reveals that, while people are living longer than ever before, they are spending more years in poor health, a phenomenon known as the "morbidity gap." This widening chasm between lifespan and healthspan has significant implications for public health policy and individual well-being.
The Global Burden of Disease (GBD) study, led by Dr. Christopher Murray, Director of the Institute for Health Metrics and Evaluation (IHME), analyzed trends in healthy aging from 1990 to 2023 across countries, regions, sex, and levels of socio-demographic development. The findings are stark: between 1990 and 2023, global life expectancy at birth increased by nearly nine years, while healthy life expectancy rose by slightly over seven years. However, the gap between these two metrics has grown, with people spending an average of 14.5% of their lives in poor health in 2023, up from 13.6% in 1990.
This trend is not limited to any one region or population group. Across all seven GBD super-regions, the number of years and proportion of life spent in poor health increased between 1990 and 2023. The high-income super-region had the largest morbidity gap in 2023 at 12.7 years, while sub-Saharan Africa had the smallest at 9.0 years.
Women, who consistently live longer than men, are disproportionately affected by this trend. They experience an average morbidity gap of 12.1 years compared to 9.3 years for men. This disparity is observed across all socio-demographic index (SDI) quintiles, indicating that women's greater longevity has not been matched by equivalent gains in healthspan.
The leading conditions and risk factors driving the morbidity gap are largely non-fatal chronic diseases, accounting for 57.4% of unhealthy years in 2023. Musculoskeletal disorders, mental disorders, sense organ diseases, falls and other unintentional injuries, and other chronic non-communicable diseases dominate this list.
Preventable or manageable risk factors also play a significant role. Globally, high fasting plasma glucose, high body mass index, child and maternal malnutrition, and tobacco use are the leading contributors to the morbidity gap. These patterns vary substantially by region and level of development, with child and maternal malnutrition emerging as a major driver in low-SDI settings.
The study's findings have far-reaching implications for public health policy and individual well-being. To address this trend, greater emphasis must be placed on preventing chronic disease, delaying disability, and ensuring access to rehabilitation, mental health services, and long-term chronic care. Investing in prevention, strengthening services that reduce years lived in poor health, and tackling key risk factors will be essential to improving healthy aging and mitigating the growing toll of disability on people, families, and health systems worldwide.
In a statement, Dr. Catherine Bisignano, Senior Scientific Writer at IHME and co-author of the study, noted, "Women are living longer than men almost everywhere in the world, but they are also spending more of those additional years in poor health. Improving healthy aging will require greater focus on the conditions and risk factors that drive years lived with disability. Addressing these earlier through prevention and better long-term care could have meaningful social, health system, and economic impacts."
The Global Burden of Disease (GBD) study is a comprehensive effort to quantify and understand the burden of disease worldwide. Its findings provide critical insights into the complex relationships between demographic, economic, and health factors that shape human well-being.
In this era of unprecedented global connectivity and economic growth, it is imperative that we prioritize the development of effective strategies to promote healthy aging and reduce the morbidity gap. The GBD study's conclusions serve as a clarion call for policymakers, healthcare providers, and individuals alike to act with urgency and purpose to address this pressing issue.
Written by: Chad Mirage | The Citizen Edition
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