Socioeconomic Determinants of Diabetes Self-Care and Health Literacy Among Adults in Southern Riyadh

Background/Objectives: Social determinants of health, including income, age, education, and gender, have been proposed to shape diabetes self-care capacity, yet their joint associations within Saudi Arabian primary healthcare populations remain poorly delineated. Anchored within the World Health Organization's Commission on Social Determinants of Health framework and the Social Ecological Model, this study examined both the unadjusted and, via multivariable regression, adjusted associations of four sociodemographic factors with diabetes self-care management and health literacy among adults in southern Riyadh. Methods: A cross-sectional correlational design was employed with 92 adults with type 2 diabetes recruited from primary healthcare centers in southern Riyadh. Data were collected using the Arabic HLS-Q12 (health literacy) and SDSCA-Arabic (self-care management). Non-parametric Spearman rank-order correlations were conducted to examine bivariate associations. Multivariable linear regression was subsequently performed to estimate adjusted associations for each sociodemographic variable. Bivariate analyses were conducted using IBM SPSS Statistics for Windows, Version 25.0 (IBM Corp., Armonk, NY, USA), while multivariable linear regression analyses were performed using Python version 3.12 with the statsmodels package. Results: Income level showed significant, moderate positive unadjusted correlations with both self-care management (rs = 0.40, 95% CI [0.21, 0.56], p < 0.01) and health literacy (rs = 0.41, 95% CI [0.22, 0.57], p < 0.01). Age showed the strongest negative unadjusted correlation with self-care management (rs = -0.49, 95% CI [-0.63, -0.31], p < 0.01) and a significant negative correlation with health literacy (rs = -0.36, 95% CI [-0.53, -0.17], p < 0.01). Educational attainment was significantly associated with both self-care management (rs = 0.29, 95% CI [0.09, 0.47], p < 0.01) and health literacy (rs = 0.26, 95% CI [0.06, 0.44], p < 0.05). Gender did not reach statistical significance for either outcome. A multivariable model adjusting for all four sociodemographic variables confirmed that income and age remained independently associated with both outcomes, whereas education and gender did not. These findings do not establish independent or causal effects from the bivariate correlations alone; the adjusted results are reported separately below. Conclusions: Income and age were independently associated with both diabetes self-care and health literacy after multivariable adjustment, whereas education and gender were not. Findings support equity-focused nursing interventions and age-responsive diabetes education attentive to the social patterning of self-care disparities in southern Riyadh.