Globally, Diabetes Underdiagnosed, Poorly Controlled

Globally, Diabetes Underdiagnosed, Poorly Controlled With Treatment

Diabetes - how diabetes is globally underdiagnosed, how treatment often fails to achieve adequate control, why that matters, and what the key figures and challenges are.

What the Latest Data Shows

Prevalence is rising sharply.
- According to WHO, in 2022 about 14% of adults (aged 18+) globally were living with diabetes — up from ~7% in 1990. World Health Organization
- More than 830 million adults now have diabetes, far more than previous estimates; low- and middle-income countries (LMICs) account for a large and growing share of these cases. Reuters+2World Health Organization+2
Underdiagnosis is widespread.
- Roughly 44% of adults with diabetes around the world are undiagnosed (i.e., they don’t know they have it). www.ndtv.com+3Business Standard+3scimex.org+3
- This gap is especially large in certain regions: sub-Saharan Africa, Southeast Asia, and parts of the Western Pacific. WHO | Regional Office for Africa+3The Guardian+3scimex.org+3
Diagnosis rates vary by age, income, and region.
- Younger adults are less likely to be diagnosed compared to older adults. Business Standard+1
- Countries with better health infrastructure and higher incomes tend to have far higher diagnosis rates. For example, high-income North America, Western Europe, Southern Latin America have much better diagnosis and treatment figures. In contrast, central sub-Saharan Africa has extremely low diagnosis coverage. scimex.org+2Business Standard+2
Among those diagnosed, treatment is common, but control is weak for many.
- Of those who know they have diabetes, over 90% receive some form of treatment. Business Standard+1
- Nonetheless, only about 40-42% of those under treatment manage to get their blood glucose to safe or target levels. Business Standard+1
- Overall, only about 21% of all people with diabetes (diagnosed or not) have their blood sugar under control. scimex.org+1

Why This Matters

Health complications: Undiagnosed or poorly controlled diabetes increases risk of serious complications — damage to eyes (retinopathy), kidneys (nephropathy), nerves (neuropathy), cardiovascular disease, amputations, etc.
Silent progression: Many people with early or moderate diabetes have few or no symptoms, so disease advances unnoticed until complications emerge. Early diagnosis allows intervention (lifestyle, medications) that can reduce harm.
Economic burden: Both for individuals and health systems. Costs of long-term complications and hospitalizations are high. Productivity losses due to morbidity/mortality are large.
Inequalities: LMICs suffer disproportionately — fewer resources for screening, less access to diagnostics and medications, poorer patient follow-up, lower awareness. This exacerbates health disparities.

Barriers to Diagnosis and Effective Treatment

Limited access to screening and diagnostics
- In many regions there are few clinics, few health personnel trained to detect early diabetes, and limited availability of lab tests (like fasting glucose or HbA1c). Rural populations may have to travel far. The Guardian+2WHO | Regional Office for Africa+2
Awareness is low
- People may not recognize symptoms; public health messaging may be weak. Health systems may not proactively screen high-risk populations.
Cost and affordability
- Even when diagnosed, treatment (medications, monitoring, follow-ups) may be unaffordable. In some countries insulin or other essential drugs are expensive or hard to obtain.

Health system challenges
- Inadequate infrastructure, poor continuity of care, lack of trained personnel. Weak or fragmented primary care. Logistic problems in drug supply, monitoring, follow-ups.
Lifestyle and social factors
- Issues like diet, sedentary behaviour, obesity, co-morbidities, education, socioeconomic status influence both risk of diabetes and ability to manage it.
Younger people less likely to be diagnosed
- Because routine screening focuses on older age groups; symptoms in younger adults may be dismissed or not taken seriously; younger people may have less frequent contact with health services.

Recent Trends and Improvements

Diagnosis and treatment coverage have improved since 2000. The proportion diagnosed has risen somewhat. Business Standard+1
Treatment rates among those diagnosed are quite high in many regions.

But: despite progress, control rates (glycaemic control) still remain insufficient overall. The gap between having treatment and attaining good control is large.

What Needs to Be Done (Key Interventions)

Wider screening, especially in high-risk populations (older age, obesity, family history) and in LMICs; integrating screening into primary care.
Public awareness campaigns about symptoms, risk factors, importance of early detection.
Improved access to diagnostics and affordable medications, including insulin, glucose monitors, etc.
Strengthening primary health care systems: training, care pathways, regular patient follow up.
Lifestyle interventions: diet, physical activity, weight management.
Policy interventions: making treatments affordable, insurance or subsidy schemes, regulatory measures.
Technology & innovation: e.g. telemedicine, task shifting (community health workers), mobile screening tools, digital monitoring.
Data and surveillance: better, more accurate data at country/regional level to understand gaps and trends.

Summary

Globally, diabetes is a rapidly growing public health crisis. A large fraction of people with the disease are undiagnosed, especially in low-resource settings and among younger adults. Even among those diagnosed and treated, many do not reach desired glycaemic control. This poor detection and control lead to preventable complications, higher mortality, and large economic and social burdens. Addressing this involves improved screening, better access to treatment, stronger health systems, and policies targeted at equity and prevention.