Richard O. White

Health Literacy Explains Racial Disparities in Diabetes Medication Adherence

Although low health literacy and suboptimal medication adherence are more prevalent in racial/ethnic minority groups than Whites, little is known about the relationship between these factors in adults with diabetes, and whether health literacy or numeracy might explain racial/ethnic disparities in diabetes medication adherence. Previous work in HIV suggests health literacy mediates racial differences in adherence to antiretroviral treatment, but no study to date has explored numeracy as a mediator of the relationship between race/ethnicity and medication adherence. This study tested whether health literacy and/or numeracy were related to diabetes medication adherence, and whether either factor explained racial differences in adherence. Using path analytic models, we explored the predicted pathways between racial status, health literacy, diabetes-related numeracy, general numeracy, and adherence to diabetes medications. After adjustment for covariates, African American race was associated with poor medication adherence (r = −0.10, p < .05). Health literacy was associated with adherence (r = .12, p < .02), but diabetes-related numeracy and general numeracy were not related to adherence. Furthermore, health literacy reduced the effect of race on adherence to nonsignificance, such that African American race was no longer directly associated with lower medication adherence (r = −0.09, p = .14). Diabetes medication adherence promotion interventions should address patient health literacy limitations.

Diabetes Numeracy: An overlooked factor in understanding racial disparities in glycemic control

OBJECTIVE Understanding the reasons and eliminating the pervasive health disparities in diabetes is a major research, clinical, and health policy goal. We examined whether health literacy, general numeracy, and diabetes-related numeracy explain the association between African American race and poor glycemic control (A1C) in patients with diabetes. RESEARCH DESIGN AND METHODS Adults with type 2 diabetes (n = 383) were enrolled in a cross-sectional study at primary care and diabetes clinics at three medical centers. Data collected included the following: self-reported race, health literacy, general numeracy, diabetes-related numeracy, A1C, and sociodemographic factors. A series of structural equation models were estimated to explore the interrelations between variables and test for mediation. RESULTS In model 1, younger age (r = −0.21, P < 0.001), insulin use (r = 0.27, P < 0.001), greater years with diabetes (r = 0.16, P < 0.01), and African American race (r = 0.12, P < 0.01) were all associated with poorer glycemic control. In model 2, diabetes-related numeracy emerged as a strong predictor of A1C (r = −0.46, P < 0.001), reducing the association between African American and poor glycemic control to nonsignificance (r = 0.10, NS). In model 3, African American race and older age were associated with lower diabetes-related numeracy; younger age, insulin use, more years with diabetes, and lower diabetes-related numeracy were associated with poor glycemic control. CONCLUSIONS Diabetes-related numeracy reduced the explanatory power of African American race, such that low diabetes-related numeracy, not African American race, was significantly related to poor glycemic control. Interventions that address numeracy could help to reduce racial disparities in diabetes.

Health Literacy, Physician Trust, and Diabetes-related Self-care Activities in Hispanics with Limited Resources

Background. Hispanics with diabetes often have deficits in health literacy (HL). We examined the association among HL, psychosocial factors, and diabetes-related self-care activities. Methods. Cross-sectional analysis of 149 patients. Data included patient demographics and validated measures of HL, physician trust, self-efficacy, acculturation, self-care behaviors, and A1c. Results. Participants (N=60) with limited HL were older and less educated, and had more years with diabetes compared with adequate HL participants (N=89). Limited HL participants reported greater trust in their physician, greater self-efficacy, and better diet, foot care, and medication adherence. Health literacy status was not associated with acculturation or A1c. In adjusted analyses, HL status remained associated with physician trust, and we observed a notable but nonsignificant trend between HL status and medication adherence. Discussion. Lower HL was associated with greater physician trust and better medication adherence. Further research is warranted to clarify the role of HL and physician trust in optimizing self-care for Hispanics.

Health communication, self-care, and treatment satisfaction among low-income diabetes patients in a public health setting

OBJECTIVE Diabetes patients with limited resources often experience suboptimal care. Less is known about the role of effective health communication (HC) in caring for low income diabetes patients. METHODS Ten health department clinics in TN participated in a trial evaluating a literacy-sensitive communication intervention. We assessed the quality of baseline HC and measured associations with diabetes outcomes. Assessments included: demographics, measures of HC, health literacy, self-care behaviors, self-efficacy, medication non-adherence, treatment satisfaction, and A1C. Unadjusted and adjusted multivariable regression models were used to test associations. RESULTS Participants (N=411) were 49.7±9.5 years, 61% female, uninsured (96%), with A1C 9.6±2.1. In unadjusted analyses, better communication, was associated with lower medication non-adherence (OR 0.40-0.68, all p<0.05), higher treatment satisfaction (OR 1.76-1.96, all p<0.01), portion size reduction (OR 1.43, p<0.05), diabetes self-efficacy (OR 1.41, p<0.05), and lower A1C (β=-0.06, p<0.01). In adjusted analyses, communication quality remained associated with lower medication non-adherence (AOR 0.39-0.68, all p<0.05), and higher treatment satisfaction (AOR 1.90-2.21, all p<0.001). CONCLUSIONS Better communication between low-income patients and providers was independently associated with lower medication non-adherence and higher treatment satisfaction. PRACTICE IMPLICATIONS Communication quality may be an important modifiable approach to improving diabetes care for vulnerable populations.

Development and Validation of a Spanish Diabetes-Specific Numeracy Measure: DNT-15 Latino

BACKGROUND Although deficits in health literacy and numeracy have been described among Latinos, the impact of low numeracy on diabetes outcomes has not been studied. Study objectives were (1) to establish the reliability and validity of a 15-item Spanish, diabetes-specific numeracy measure (Diabetes Numeracy Test [DNT]-15 Latino) and (2) to examine the relationship between diabetes-specific numeracy and diabetes-related outcomes among a sample of Latino adults with diabetes. METHODS Data collection included patient demographics, health literacy, general numeracy, diabetes-specific numeracy, acculturation, self-efficacy, self-care behaviors, and most recent glycosylated hemoglobin (HbA1c). RESULTS Participants (n=144) were on average 47.8 years old (SD=12.1). The majority were female (62%), uninsured (81%), and of Mexican nationality (78%) and reported low levels of acculturation (96%). The DNT-15 Latino had high internal reliability (Kruder-Richardson 20=0.78). The DNT-15 Latino demonstrated construct validity, correlating with measures of health literacy (ρ=0.291), general numeracy (ρ=0.500), education (ρ=0.361), and income (ρ=0.270) (P<0.001 for each). The DNT-15 Latino was significantly associated with acculturation but unrelated to self-efficacy, self-care behaviors, insulin use, and HbA1c. CONCLUSIONS The DNT-15 Latino is a reliable and valid measure of diabetes-specific numeracy for Latino patients with diabetes; however, additional studies are needed to further explore the association between diabetes-specific numeracy and acculturation and their impact on diabetes-related outcomes for Latinos.

Perceptions of Provider Communication Among Vulnerable Patients With Diabetes: Influences of Medical Mistrust and Health Literacy

Patient–provider communication is modifiable and is linked to diabetes outcomes. The association of communication quality with medical mistrust is unknown. We examined these factors within the context of a low-literacy/numeracy-focused intervention to improve diabetes care, using baseline data from diverse patients enrolled in a randomized trial of a health communication intervention. Demographics, measures of health communication (Communication Assessment Tool [CAT], Interpersonal Processes of Care survey [IPC-18]), health literacy (Short Test of Functional Health Literacy in Adults), depression, medical mistrust, and glycemic control were ascertained. Adjusted proportional odds models were used to test the association of mistrust with patient-reported communication quality. The interaction effect of health literacy on mistrust and communication quality was also assessed. A total of 410 patients were analyzed. High levels of mistrust were observed. In multivariable modeling, patients with higher mistrust had lower adjusted odds of reporting a higher CAT score (adjusted odds ratio [AOR] = 0.67, 95% confidence interval [CI] [0.52, 0.86], p = .003) and higher scores on the Communication (AOR = 0.69, 95% CI [0.55, 0.88], p = .008), Decided Together (AOR = 0.74, 95% CI [0.59, 0.93], p = .02), and Interpersonal Style (AOR = 0.69, 95% CI [0.53, 0.90], p = .015) subscales of the IPC-18. We observed evidence of an interaction effect of health literacy for the association between mistrust and the Decided Together subscale of the IPC-18 such that patients with higher mistrust and lower literacy perceived worse communication relative to mistrustful patients with higher literacy. In conclusion, medical mistrust was associated with poorer communication with providers in this public health setting. Patients’ health literacy level may vary the effect of mistrust on interactional aspects of communication. Providers should consider the impact of mistrust on communication with vulnerable diabetes populations and focus efforts on mitigating its influence.

A Multiinstitutional, Multidisciplinary Model for Developing and Teaching Translational Research in Health Disparities

Health disparities may affect any person in any community in the world, resulting from a multitude of factors including socioeconomic status, race, ethnicity, environment, and genetics. The impact of health disparities is felt by affected individuals, their families, communities, and the greater health care system.

Exploring Disease Management Programs for Diabetes Mellitus Proposal of a Novel Hybrid Model

Diabetes mellitus is a chronic illness that affects the world on an epidemic scale. It requires complex healthcare and considerable economic resources. Diabetes disease management programs use a variety of strategies to improve clinical outcome measures and reduce costs. Studies have demonstrated the effectiveness of these programs on reducing glycosylated hemoglobin levels, improving cardiovascular risks, and reducing utilization of services. However, the most effective components of disease management strategies or combination of strategies remain unknown. This narrative review explores the components, impact, benefits, and barriers of current diabetes disease management models and also presents a novel hybrid model incorporating elements of both on-site and off-site programs.On-site disease management programs include strategies characterized by unique patient identification and evaluation, implementation of intervention methods, on-site health provider team members, and specific environmental resources. Advantages of this model include the face-to-face encounter between patients and providers, the proximity of the healthcare team members to facilitate ease of communication and build independence and trust between patients and providers, and technology resources, such as the electronic medical record. A number of clinical trials have demonstrated the effectiveness and cost effectiveness of on-site diabetes disease management programs. However, because of the methodological limitations of many studies, further studies are needed to confirm such findings. Barriers to the implementation of on-site programs may include patient population characteristics such as complexity of co-morbid illness and social Stressors, including low health literacy, that require adaptation of the disease management model. In comparison, off-site disease management programs utilize administrative resources to identify patients with chronic illnesses. Other key elements include the evaluation of clinical care practices using established guidelines with auditing and feedback to providers based on their performance, and the use of reminders for both patients and providers to influence better processes of care. This process is often independent of the traditional on-site care delivered directly by providers.A hybrid disease management model that incorporates both on-site and off-site disease management components could be the ideal model for optimizing care of patients with chronic illness. The suggested hybrid model incorporates many features of previous models of disease management but gives a new construct that can be customized to different clinic settings, provider practices, and patient populations, including patients with other complex chronic illness. This hybrid model could be applied to a variety of individual or multiple chronic illnesses. This model would engage both on-site healthcare providers and support staff along with off-site administrative staff and electronic medical data to provide patients optimal care while potentially reducing overall costs.

The PRIDE (Partnership to Improve Diabetes Education) Toolkit: Development and Evaluation of Novel Literacy and Culturally Sensitive Diabetes Education Materials

Purpose Patients with low literacy, low numeracy, and/or linguistic needs can experience challenges understanding diabetes information and applying concepts to their self-management. The authors designed a toolkit of education materials that are sensitive to patients’ literacy and numeracy levels, language preferences, and cultural norms and that encourage shared goal setting to improve diabetes self-management and health outcomes. The Partnership to Improve Diabetes Education (PRIDE) toolkit was developed to facilitate diabetes self-management education and support. Methods The PRIDE toolkit includes a comprehensive set of 30 interactive education modules in English and Spanish to support diabetes self-management activities. The toolkit builds upon the authors’ previously validated Diabetes Literacy and Numeracy Education Toolkit (DLNET) by adding a focus on shared goal setting, addressing the needs of Spanish-speaking patients, and including a broader range of diabetes management topics. Each PRIDE module was evaluated using the Suitability Assessment of Materials (SAM) instrument to determine the material’s cultural appropriateness and its sensitivity to the needs of patients with low literacy and low numeracy. Reading grade level was also assessed using the Automated Readability Index (ARI), Coleman-Liau, Flesch-Kincaid, Fry, and SMOG formulas. Conclusions The average reading grade level of the materials was 5.3 (SD 1.0), with a mean SAM of 91.2 (SD 5.4). All of the 30 modules received a “superior” score (SAM >70%) when evaluated by 2 independent raters. The PRIDE toolkit modules can be used by all members of a multidisciplinary team to assist patients with low literacy and low numeracy in managing their diabetes.

Health Care Disparities and Diabetes Care: Practical Considerations for Primary Care Providers

IN BRIEF Disparities in diabetes care are prevalent in the United States. This article provides an overview of these disparities and discusses both potential causes and efforts to address them to date. The authors focus the discussion on aspects relevant to the patient-provider dyad and provide practical considerations for the primary care providers role in helping to diminish and eliminate disparities in diabetes care.