Family History and Risk Factors in Type 2 Diabetes

Type 2 diabetes is a chronic metabolic disorder characterised by persistent hyperglycaemia due to insulin resistance and impaired β-cell function. A positive family history is among the strongest non-modifiable predictors, reflecting both inherited genetic variants and shared environmental influences. Offspring of affected first-degree relatives often present with earlier onset and increased prevalence of microvascular and macrovascular complications. Studies indicate a stronger maternal than paternal transmission, suggesting intrauterine programming and epigenetic modifications. Beyond genetics, the interaction with lifestyle factors—such as obesity, dietary patterns and physical inactivity—amplifies disease risk. Psychosocial elements, including depression and quality-of-life measures, further contribute to individual vulnerability. Recognising familial predisposition informs risk stratification and underpins targeted screening and preventive measures. Global research underscores heterogeneity in familial aggregation across populations, reinforcing the need for culturally sensitive strategies to delay or prevent onset through personalised interventions.

Research from Nature Portfolio

Recent cross-sectional analyses in East Africa have reported that approximately 45% of patients attending a diabetes clinic had a family history of the condition, which correlated with longer disease duration, higher prevalence of retinopathy and hypertension, and increased rates of depressive disorder and diminished well-being. In a large Chinese cohort of over 20,000 individuals, 21% reported familial diabetes; those with first-degree relatives exhibited a 37% higher odds of poor glycaemic control, with maternal history posing the greatest risk. Stratified analyses revealed this adverse effect was most pronounced among younger, overweight or physically inactive subgroups.

Family History and Risk Factors in Type 2 Diabetes publication trend

The graph below shows the total number of articles in family history and risk factors in type 2 diabetes across all publications each year (not limited to Nature Index journals).

Technical terms

First-degree relative: A parent, sibling or offspring of an individual, sharing approximately 50% of genetic material.

Glycaemic control: The maintenance of blood glucose levels within a defined target range.

Insulin resistance: A reduced responsiveness of cells to insulin, necessitating greater hormone levels to achieve glucose uptake.

Homeostatic Model Assessment of Insulin Resistance (HOMA-IR): An index estimating insulin resistance from fasting plasma glucose and insulin concentrations.

Odds ratio (OR): A measure comparing the odds of an outcome occurring in one group with those in another.

Hazard ratio (HR): A statistic describing the rate at which an event (e.g., disease onset) occurs in one group versus another over time.

References

1. Association of type 2 diabetes with family history of diabetes, diabetes biomarkers, mental and physical disorders in a Kenyan setting. Scientific Reports (2024).
2. Association between Family History Risk Categories and Prevalence of Diabetes in Chinese Population. PLOS ONE (2015).
3. Positive parental history of diabetes is associated with early diagnosis, better dietary compliance, and glycemic control among type 2 diabetes patients in southern Sri Lanka. Diabetology & Metabolic Syndrome (2024).
4. Clinical trait and systemic risk of familial diabetes mellitus according to its onset timing and number: A community-based KoGES cohort study. Epidemiology and Health (2023).
5. Lean legacy, heavy heritage: family history of diabetes and its association with young adult body mass index.. Journal of Biosocial Science (2023).