Global prevalence of diabetes
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Global Diabetes Prevalence: Current Estimates and Trends
Worldwide Diabetes Prevalence and Number of Cases
The global prevalence of diabetes has risen sharply over recent decades. In 2019, about 9.3% of adults worldwide—equivalent to 463 million people—were living with diabetes, and this number is projected to increase to 578 million by 2030 and 700 million by 2045 57. Earlier estimates showed a prevalence of 2.8% in 2000, rising to 4.4% by 2030, with the number of people affected expected to more than double from 171 million in 2000 to 366 million in 2030 . More recent data indicate that the prevalence among adults was 8.8% in 2017 (451 million people), with projections reaching 9.9% (693 million) by 2045 47. The number of adults with diabetes increased from 108 million in 1980 to 422 million in 2014, nearly quadrupling over this period .
Regional and Demographic Differences in Diabetes Prevalence
Diabetes prevalence is higher in urban areas (10.8%) compared to rural areas (7.2%), and in high-income countries (10.4%) compared to low-income countries (4.0%) . However, the fastest growth in diabetes cases is occurring in low- and middle-income countries, which now account for about 75% of all people with diabetes 4567+1 MORE. The burden is particularly high in regions such as Polynesia and Micronesia, where prevalence can exceed 25% . The majority of people with diabetes in developing countries are aged 45–64, while in developed countries, most are over 65 .
Age and Gender Patterns
Diabetes prevalence increases with age, reaching about 20% in people aged 65–69 years . The incidence of type 2 diabetes peaks around age 55 . While prevalence is often higher in men, there are more women living with diabetes globally, especially in developed countries 12. The gender distribution is roughly equal in recent years .
Undiagnosed Diabetes and Pre-Diabetes
A significant concern is that about half of all people with diabetes are undiagnosed 57. Additionally, hundreds of millions more have impaired glucose tolerance or pre-diabetes, putting them at high risk of developing diabetes in the future 457.
Future Projections and Public Health Implications
All studies agree that the global diabetes epidemic will continue to grow, with projections indicating a 25% increase in cases by 2030 and a 51% increase by 2045 57. The rise is driven by population growth, ageing, urbanization, and increasing obesity rates 1348+1 MORE. The economic and health system burden is substantial, with billions spent annually on diabetes care and millions of deaths attributable to the disease each year 4710.
Conclusion
Diabetes is a rapidly growing global health challenge, with prevalence rates and total cases rising in every region, especially in low- and middle-income countries. The trend is expected to continue, underscoring the urgent need for effective prevention, early detection, and management strategies worldwide.
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