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Purpose: The purpose of this study was to explore how treatment adherence and lifestyle changes required for glycemic control in type 2 diabetes (T2D) are related to quality of life (QoL) among predominantly ethnic minority and socioeconomically disadvantaged adults engaged in making changes to improve T2D self-management. Methods: Adults with T2D in New York City were recruited for the parent study based on recent A1C (≥7.5%) and randomly assigned to 1 of 2 arms, receiving educational materials and additional self-management support calls, respectively. Substudy participants were recruited from both arms after study completion. Participants (N = 50; 62% Spanish speaking) were interviewed by phone using a semistructured guide and were asked to define QoL and share ways that T2D, treatment, self-management, and study participation influenced their QoL. Interviews were analyzed using thematic analysis. Results: QoL was described as a multidimensional health-related construct with detracting and enhancing factors related to T2D. Detracting factors included financial strain, symptom progression and burden, perceived necessity to change cultural and lifestyle traditions, and dietary and medical limitations. Enhancing factors included social support, diabetes education, health behavior change, sociocultural connection. Conclusion: QoL for diverse and socioeconomically disadvantaged adults with T2D is multifaceted and includes aspects of health, independence, social support, culture, and lifestyle, which may not be captured by existing QoL measures. Findings may inform the development of a novel QoL measure for T2D.

Introduction: While people with T1D report that blood glucose (BG) fluctuations affect their day-to-day functioning, these relationships are poorly understood. Using continuous glucose monitoring (CGM) , accelerometry, and momentary surveys and cognitive tasks, we sought to understand how various BG metrics during sleeping hours impact functioning the following day. Methods: Participants wore a blinded CGM and accelerometer for 10-14 days, during which they completed surveys and cognitive tasks 5-6 times per day. Using dynamic structural equation modeling, we evaluated the within-person impact of overnight BG on the following day’s functioning, while controlling for the prior day’s functioning. BG variables included % time 250 mg/dL, and coefficient of variation (CV) . Functioning variables included cognitive measures of sustained attention and perceptual speed; daily step count; and self-reported fatigue, task performance, and net activity demand. Results: Among 127 adults with T1D (41±15 yrs, 46% male, 39% Latinx, 35% White, 10% Black, 4% Asian, 12% multiethnic/other) , all three BG variables predicted changes in next day functioning. More time 250 predicted more fatigue (0.09) and lower step count (-0.12) (all p Conclusion: Our findings indicate that overnight BG impacts cognition, physical activity, fatigue, and activity engagement the following day. While effect sizes are small, the cumulative impact of these decrements in function should be considered in the context of a life-long disorder. The consistent findings among diverse outcomes, including both objective and self-report measures, strengthen confidence in the overall conclusion that overnight BG has wide-ranging implications for functioning in adults with T1D. Disclosure E. Pyatak: Research Support; Abbott Diabetes. D. Spruijt-Metz: None. S. Schneider: None. J.P. Crandall: Research Support; Abbott Diabetes. A.L. Peters: Advisory Panel; Abbott Diabetes, AstraZeneca, Eli Lilly and Company, Novo Nordisk, Shouti, Vertex Pharmaceuticals Incorporated, Zealand Pharma A/S. Research Support; Abbott Diabetes, Dexcom, Inc., Insulet Corporation, Leona M. and Harry B. Helmsley Charitable Trust. Stock/Shareholder; Teladoc Health. Other Relationship; Omada Health, Inc. H. Jin: None. S. Agarwal: Advisory Panel; Medtronic. Consultant; Beta Bionics, Inc. L.T. Pham: None. A. Ali: None. C.J. Hoogendoorn: None. G. Crespo-Ramos: None. R. Basile: None. J.S. Gonzalez: Consultant; Virta Health Corp. Funding National Institutes of Health (1R01DK121298-01)

Introduction: Research links self-efficacy and diabetes distress to suboptimal diabetes self-care and blood glucose (BG) regulation. However, most studies rely on between-person comparisons that cannot rule out confounding by unmeasured variables or capture the dynamic interplay among these variables in real time. Pairing continuous glucose monitoring (CGM) with ecological momentary assessment, we sought to illuminate pathways of influence among these variables in a diverse sample of adults with T1D. Methods: Participants (N=127, 41±15 yrs, 53% women, 39% Latino, 35% White, 10% Black) wore blinded CGM for 10-14 days and completed smartphone surveys 5-6 times per day. Using dynamic structural equation modeling, we evaluated within-person pathways shown in Figure 1. Results: Hypothesized pathways were significant, as were indirect effects of:1) morning self-efficacy on that day’s mean BG via diabetes distress and self-care and2) diabetes distress on mean BG via self-care. Similar results were observed for time in range and SD of BG. Conclusion: Our findings provide novel evidence for a sequential pathway of influence of psychological, emotional, and behavioral variables on BG regulation, observed over time and within individuals. These results provide a roadmap for interventions that target self-efficacy, diabetes distress, and self-care to improve BG regulation among adults with T1D. Disclosure J.S.Gonzalez: Consultant; Virta Health Corp. H.Jin: None. L.T.Pham: None. A.Ali: None. P.Lee: None. V.F.Ruelas: n/a. R.Basile: None. E.Pyatak: Research Support; Abbott Diabetes. D.Spruijt-metz: None. S.Schneider: None. A.L.Peters: Advisory Panel; Abbott Diabetes, AstraZeneca, Eli Lilly and Company, Novo Nordisk, Shouti, Vertex Pharmaceuticals Incorporated, Zealand Pharma A/S, Other Relationship; Omada Health, Inc., Research Support; Abbott Diabetes, Dexcom, Inc., Insulet Corporation, Leona M. and Harry B. Helmsley Charitable Trust, Stock/Shareholder; Teladoc Health. J.P.Crandall: Research Support; Abbott Diabetes. G.Crespo-ramos: None. H.Mendez-rodriguez: None. C.J.Hoogendoorn: None. S.Agarwal: Advisory Panel; Medtronic, Consultant; Beta Bionics, Inc. Funding National Institutes of Health (1R01DK121298-01; P30 DK111022)

We examined emotional distress in relation to metformin adherence, overall diabetes self-management, and glycemic control among adults with early type 2 diabetes (T2DM) enrolled in the GRADE study.Linear regression models examined cross-sectional associations of baseline depression symptoms and diabetes distress with adherence to metformin, self-management, and HbA1c, adjusting for covariates. Cognitive-affective (e.g., sadness) and somatic (e.g., sleep/appetite disturbance) depression symptoms and diabetes distress subscales were also examined.This substudy of 1,739 GRADE participants (56% Non-Hispanic White, 18% Non-Hispanic Black, 17% Hispanic, 68% male, mean[SD] age=57.96[10.22] years, diabetes duration=4.21[2.81] years, and HbA1c=7.51[0.48]). The prevalence of clinically significant depression and diabetes distress was 8.7% and 25%, respectively. Fully adjusted models showed that depression symptoms were associated with lower self-management (p0.0001); this effect was only significant for somatic symptoms. Diabetes distress was associated with lower adherence (p=0.0001) and self-management (p0.0001); effects were significant for all subscales, except physician-related distress. No significant relationships of total depression symptom severity or diabetes distress with HbA1c were found.Depression symptoms and diabetes distress were robustly associated with problematic diabetes self-management among participants in GRADE. These findings highlight the need for routine assessment of depression symptoms and diabetes distress early in T2DM care.