Abstract
BackgroundEducational attainment is a critical determinant of health outcomes. Lower education levels have been associated with higher mortality and increased risk of chronic diseases in the general population, but its specific impacts on both traditional and non-traditional complications of type 2 diabetes remain unclear. We aimed to investigate the associations between educational attainment and risks of all-cause mortality, traditional complications, and non-traditional complications in a large prospective cohort of patients with type 2 diabetes.MethodsWe analyzed data from the UK Biobank, collected from March 13, 2006, to June 30, 2023. Educational attainment was categorized as college, high school, or less than high school. Primary outcomes included all-cause mortality, traditional complications (e.g., cardiovascular disease, chronic kidney disease, diabetic retinopathy), and non-traditional complications (e.g., cancer, cognitive impairment, liver disease, infections, and affective disorders). Hazard ratios (HRs) were estimated using Cox proportional hazard models adjusted for sociodemographic, clinical, and diabetes-specific covariates. Sensitivity and interaction analyses were performed to assess robustness and effect modifiers.ResultsA total of 23,246 participants with type 2 diabetes (median age 61.0 years [IQR 55.0-65.0], 38.3% women) were included in the final analyses. During a median follow-up of 13.98 years (IQR 13.11-14.86), 5,196 deaths were recorded. Compared with college-educated participants, those with less than high school education had a 27% higher risk of all-cause mortality (HR 1.27, 95% CI 1.18-1.38). Traditional complications were more common in lower-educated groups, including cardiovascular disease (HR 1.30, 95% CI 1.18-1.43) and chronic kidney disease (HR 1.40, 95% CI 1.28-1.54), but not diabetic retinopathy. Non-traditional complications were also more prevalent, including cognitive impairment (HR 1.40, 95% CI 1.16-1.68), liver disease (HR 1.26, 95% CI 1.10-1.45), infections (HR 1.26, 95% CI 1.17-1.37), and affective disorders (HR 1.43, 95% CI 1.22-1.67). Findings were consistent across sensitivity analyses, and interactions were observed for age, sex, and diabetes duration.ConclusionsLower educational attainment is associated with increased risks of all-cause mortality, and traditional and non-traditional diabetes-related complications. These findings underscore the need for targeted interventions to address educational disparities in diabetes management and improve health literacy among vulnerable populations.</p>