Recent research reveals that while global life expectancy rises, the duration of years lived with poor health is also increasing, widening a gap known as the morbidity gap.
Between 1990 and 2023, average life expectancy at birth climbed from 64.6 to 73.8 years, while healthy life expectancy rose from 55.9 to 63.1 years. In the same period, the proportion of life spent in poor health grew from 13.6% to 14.5% worldwide.
In the United States, the morbidity gap amounts to roughly 14 years, representing 17.8% of the expected lifespan. The gap is most pronounced in wealthy nations where medical advances extend longevity more than functional health.
Women now live longer than men, yet they also accumulate more years of poor health, according to the analysis of 204 countries and territories.
The study identifies low back pain, depression, anxiety, hearing loss, falls and other non‑communicable conditions as the primary drivers of the gap, accounting for about 57% of all years lived in poor health. High fasting plasma glucose, obesity, and aging also contribute significantly.
Researchers emphasize that future improvements in population health will require not only extending lifespan but also expanding healthspan—the years people remain free from disability and disease. Greater investment in prevention, chronic disease management, and long‑term care is essential to reduce the years lived in poor health.
Experts argue that the next frontier in medicine is to add quality to the additional years of life, focusing on preserving physical, cognitive, and social function rather than merely treating disease. Routine assessments of mobility, strength, balance, hearing, cognition, and overall resilience could become as vital as monitoring blood pressure, cholesterol, and glucose.
Musculoskeletal health is highlighted as a key area for preventive care. Progressive resistance training, fall prevention, muscle mass maintenance, and early treatment of chronic back pain are proposed as core components of preventive medicine.
Mental health and social connection are also critical to extending healthy years. Hearing loss, depression, anxiety, and loneliness often reinforce one another, accelerating physical decline and diminishing quality of life. Early intervention in these areas can improve both longevity and independence.
Social roles and community engagement are recognized as protective factors against loneliness and loss of identity. In many societies outside the United States, older adults maintain active, respected positions within multigenerational families, providing purpose and belonging. In contrast, increasing social isolation among older Americans underscores the importance of community and human connection in healthy aging.
