Exploring ethnic representativeness in diabetes clinical trial enrolment from 2000 to 2020: a chronological survey

Treatment persistence, adherence and healthcare resource utilisation for iGlarLixi versus basal-bolus insulin or premixed insulin in older adult ethnic minorities with type 2 diabetes: SoliEthnicity study

AIMS

Most type 2 diabetes (T2D) studies have predominantly enrolled White people aged <65 years. This retrospective study evaluated outcomes for iGlarLixi (fixed-ratio combination [FRC] of insulin glargine 100 U/mL and lixisenatide) versus basal-bolus or premixed insulin in African American, Asian and Hispanic adults with T2D aged ≥65 years.

METHODS

Medicare claims data were assessed from beneficiaries receiving basal insulin who newly initiated iGlarLixi, basal-bolus insulin, or premixed insulin between 7/1/2019 and 12/30/2021. Groups were propensity score matched at baseline and followed for up to 12 months. Endpoints (primary: treatment persistence; secondary: treatment adherence, hypoglycaemia event rates, healthcare resource utilisation) were assessed using multivariable regression.

RESULTS

Treatment persistence was higher for iGlarLixi versus basal-bolus or premixed insulin in the overall population (26.9%, 7.6%, 18.9%; adjusted p < 0.0001) and numerically higher in all ethnic subgroups. Treatment adherence was numerically higher for iGlarLixi versus basal-bolus or premixed insulin in the overall population (28.0%, 8.0%, 19.0%) and in all subgroups. Hypoglycaemia event rates were numerically lower for iGlarLixi versus basal-bolus insulin or premixed insulin in the overall population (2.5, 3.8, 7.5/100 person-years' follow-up) and in all subgroups except Asians receiving basal-bolus insulin. All-cause and diabetes-related hospitalisation and emergency department visit event rates were lower with iGlarLixi versus basal-bolus insulin or premixed insulin in the overall population, and in all subgroups except for hospitalisations in Hispanics.

CONCLUSION

FRC therapies such as iGlarLixi represent an appropriate treatment option when intensifying basal insulin therapy in ethnic minority older adults with T2D.

Discordance Between Clinician and Person-With-Diabetes Perceptions Regarding Technology Barriers and Benefits

The quality of clinician-patient relationship is integral to patient health and well-being. This article is a narrative review of published literature on concordance between clinician and patient perspectives on barriers to diabetes technology use. The goals of this manuscript were to review published literature on concordance and to provide practical recommendations for clinicians and researchers. In this review, we discuss the qualitative and quantitative methods that can be applied to measure clinician and patient concordance. There is variability in how concordance is defined, with some studies using questionnaires related to working alliance, while others use a dichotomous variable. We also explore the impact of concordance and discordance on diabetes care, barriers to technology adoption, and disparities in technology use. Published literature has emphasized that physicians may not be aware of their patients' perspectives and values. Discordance between clinicians and patients can be a barrier to diabetes management and technology use. Future directions for research in diabetes technology including strategies for recruiting and retaining representative samples, are discussed. Recommendations are given for clinical care, including shared decision-making frameworks, establishing social support groups optimizing clinician-patient communication, and using patient-reported outcomes to measure patient perspectives on outcomes of interest.

Strategies for Equitable Recruitment to Engage Underrepresented Youth and Their Families into Clinical Research: Findings from the BEAD-T1D Pilot Study

INTRODUCTION

To address disparities in clinical research, we present strategies to optimize recruitment of underrepresented families into the Building the Evidence to Address Disparities in Type 1 Diabetes (BEAD-T1D) study.

METHODS

A bilingual/bicultural Latino research assistant (RA) was hired to facilitate culturally congruent recruitment for pediatric type 1 diabetes families. The RA screened, approached, and consented families using their preferred language, time of contact, and answered personal concerns around research. Families were given the option to consent during outpatient clinic visits (in-person, or virtually via video/phone call) at a pace set by the parent/guardian to ensure understanding.

RESULTS

Sixty-four families (Hispanic-65%, Non-Hispanic White [NHW]-17%, Non-Hispanic Black-1%, and Other-4%) were eligible. Of 49 approached, 32 consented (39 ± 7.9 years; female-81%; Hispanic-72%, NHW-28%, <50K income-69%, Spanish-speaking-50%). Clinic approaches were important to successful consent: 87% of the clinic approaches resulted in consent. Barriers to clinic approaches for RA included late/no response from clinicians, care team ending visit, and bandwidth/connectivity issues. Facilitators to clinic approaches included collaborative clinic care teams, flexible RA hours, and patient screening days in advance. We exceeded our recruitment goals for surveys (31/30), focus groups/interviews (26/20), and advisory board (22/10).

CONCLUSIONS

We identified that culturally and linguistically congruent staff, flexible recruitment practices, and prioritizing participant availability were solutions to recruit a diverse study cohort resulting exceeding recruitment goals. Cultural interpersonal relationships formed with families addressed barriers to research participation within and outside of the medical system. These strategies suggest equitable clinical trial recruitment is feasible in diabetes research.

Single-cell Analysis of Debrided Diabetic Foot Ulcers Reveals Dysregulated Wound Healing Environment in non-Hispanic Blacks

Diabetic foot ulcer (DFU) is a critical complication of diabetes, but the wound microenvironment and its healing process are not completely understood. In this study, we optimized single-cell profiling from sharp debrided ulcers. Our findings demonstrate that healing-DFUs were significantly enriched with distinct fibroblasts expressing genes related to inflammation (CHI3L1, IL6) and extracellular matrix remodeling (ASPN), validating our previous studies on surgically resected ulcers. The race-focused analysis depicted lower expression of key healing-associated genes such as CHIL3L1, MMP11, and SFRP4 in fibroblasts of non-Hispanic Black (NHB) patients compared to White patients. In cellular communication analysis, healing enriched fibroblasts of NHBs exhibited upregulation of signaling pathways such as WNT while those of White showed IGF and MK pathways upregulation. Our findings advocate race as a risk marker of DFU outcomes, likely reflecting underlying disparities in environmental exposures and access to care that profoundly influence healing markers. Using sharp debrided tissues for single-cell assays, this study highlights the need for in-depth investigations into dysregulated wound healing microenvironments of under-represented racial groups.

Diabetes mellitus-Progress and opportunities in the evolving epidemic

Diabetes, a complex multisystem metabolic disorder characterized by hyperglycemia, leads to complications that reduce quality of life and increase mortality. Diabetes pathophysiology includes dysfunction of beta cells, adipose tissue, skeletal muscle, and liver. Type 1 diabetes (T1D) results from immune-mediated beta cell destruction. The more prevalent type 2 diabetes (T2D) is a heterogeneous disorder characterized by varying degrees of beta cell dysfunction in concert with insulin resistance. The strong association between obesity and T2D involves pathways regulated by the central nervous system governing food intake and energy expenditure, integrating inputs from peripheral organs and the environment. The risk of developing diabetes or its complications represents interactions between genetic susceptibility and environmental factors, including the availability of nutritious food and other social determinants of health. This perspective reviews recent advances in understanding the pathophysiology and treatment of diabetes and its complications, which could alter the course of this prevalent disorder.

Race and ethnicity reporting and representation in hemophilia clinical trials

ABSTRACT

Racial and ethnic representativeness in clinical trials is crucial to mitigate disparities in outcomes; however, diversity among hemophilia trials is unknown. The aim of this study is to examine the reporting and representation of race and ethnicity in trials of people with hemophilia (PwH). In this cross-sectional study, the ClinicalTrials.gov database was queried in April 2023 for interventional clinical trials involving PwH between 2007 and 2022. The distribution of participants (observed) was compared with expected proportions based on US Hemophilia Treatment Center (HTC) and country-specific census data with observed-to-expected ratios (OERs). Of 129 trials included, 94.6% were industry sponsored, with a mean of 62 participants and mean age of 26.8 years. Overall, 52.0% (n = 66) of trials reported data on race and ethnicity, increasing from 13.9% in 2007-2012 to 22.5% in 2013-2016 to 100% in 2017-2022 (P = .001). Among these 66 trials, 65.8%, 22.8%, 5.1%, 3.9% of participants were White, Asian, Hispanic, and Black, respectively. OERs were 10% to 20% lower for White participants vs US HTC, and US, UK, and Canadian census populations and ∼75% lower for Black or Hispanic participants when compared with US HTC and US census population. OERs for Asian participants were 1.6 to 3 times higher than Canada, US, and UK census populations. The reporting of race and ethnicity in hemophilia trials has drastically improved; however, Black and Hispanic PwH remain especially underrepresented. To address these disparities, stakeholders across the clinical trial enterprise need to implement strategies to ensure equitable participation.

Participant characteristics and exclusion from phase 3/4 industry funded trials of chronic medical conditions: meta-analysis of individual participant level data

Objectives

To assess whether age, sex, comorbidity count, and race and ethnic group are associated with the likelihood of trial participants not being enrolled in a trial for any reason (ie, screen failure).

Design

Bayesian meta-analysis of individual participant level data.

Setting

Industry funded phase 3/4 trials of chronic medical conditions.

Participants

Participants were identified using individual participant level data to be in either the enrolled group or screen failure group. Data were available for 52 trials involving 72 178 screened individuals of whom 24 733 (34%) were excluded from the trial at the screening stage.

Main outcome measures

For each trial, logistic regression models were constructed to assess likelihood of screen failure in people who had been invited to screening, and were regressed on age (per 10 year increment), sex (male v female), comorbidity count (per one additional comorbidity), and race or ethnic group. Trial level analyses were combined in Bayesian hierarchical models with pooling across condition.

Results

In age and sex adjusted models across all trials, neither age nor sex was associated with increased odds of screen failure, although weak associations were detected after additionally adjusting for comorbidity (odds ratio of age, per 10 year increment was 1.02 (95% credibility interval 1.01 to 1.04) and male sex (0.95 (0.91 to 1.00)). Comorbidity count was weakly associated with screen failure, but in an unexpected direction (0.97 per additional comorbidity (0.94 to 1.00), adjusted for age and sex). People who self-reported as black seemed to be slightly more likely to fail screening than people reporting as white (1.04 (0.99 to 1.09)); a weak effect that seemed to persist after adjustment for age, sex, and comorbidity count (1.05 (0.98 to 1.12)). The between-trial heterogeneity was generally low, evidence of heterogeneity by sex was noted across conditions (variation in odds ratios on log scale of 0.01-0.13).

Conclusions

Although the conclusions are limited by uncertainty about the completeness or accuracy of data collection among participants who were not randomised, we identified mostly weak associations with an increased likelihood of screen failure for age, sex, comorbidity count, and black race or ethnic group. Proportionate increases in screening these underserved populations may improve representation in trials.

Trial registration number

PROSPERO CRD42018048202.

A virtual recruitment protocol promotes enrollment of underrepresented groups in a diabetes prevention trial

Strategies are needed to ensure greater participation of underrepresented groups in diabetes research. We examined the impact of a remote study protocol on enrollment in diabetes research, specifically the Pre-NDPP clinical trial. Recruitment was conducted among 2807 diverse patients in a safety-net healthcare system. Results indicated three-fold greater odds of enrolling in remote versus in-person protocols (AOR 2.90; P < 0.001 [95% CI 2.29-3.67]). Priority populations with significantly higher enrollment included Latinx and Black individuals, Spanish speakers, and individuals who had Medicaid or were uninsured. A remote study design may promote overall recruitment into clinical trials, while effectively supporting enrollment of underrepresented groups.

Patterns of Telemedicine Use and Glycemic Outcomes of Endocrinology Care for Patients With Type 2 Diabetes

Importance

Telemedicine can increase access to endocrinology care for people with type 2 diabetes (T2D), but patterns of use and outcomes of telemedicine specialty care for adults with T2D beyond initial uptake in 2020 are not known.

Objective

To evaluate patterns of telemedicine use and their association with glycemic control among adults with varying clinical complexity receiving endocrinology care for T2D.

Design, Setting, and Participants

Retrospective cohort study in a single large integrated US health system. Participants were adults who had a telemedicine endocrinology visit for T2D from May to October 2020. Data were analyzed from June 2022 to October 2023.

Exposure

Patients were followed up through May 2022 and assigned to telemedicine-only, in-person, or mixed care (both telemedicine and in-person) cohorts according to visit modality.

Main Outcomes and Measures

Multivariable regression models were used to estimate hemoglobin A1c (HbA1c) change at 12 months within each cohort and the association of factors indicating clinical complexity (insulin regimen and cardiovascular and psychological comorbidities) with HbA1c change across cohorts. Subgroup analysis was performed for patients with baseline HbA1c of 8% or higher.

Results

Of 11 498 potentially eligible patients, 3778 were included in the final cohort (81 Asian participants [2%], 300 Black participants [8%], and 3332 White participants [88%]); 1182 used telemedicine only (mean [SD] age 57.4 [12.9] years; 743 female participants [63%]), 1049 used in-person care (mean [SD] age 63.0 [12.2] years; 577 female participants [55%]), and 1547 used mixed care (mean [SD] age 60.7 [12.5] years; 881 female participants [57%]). Among telemedicine-only patients, there was no significant change in adjusted HbA1c at 12 months (-0.06%; 95% CI, -0.26% to 0.14%; P = .55) while in-person and mixed cohorts had improvements of 0.37% (95% CI, 0.15% to 0.59%; P < .001) and 0.22% (95% CI, 0.07% to 0.38%; P = .004), respectively. Patients with a baseline HbA1c of 8% or higher had a similar pattern of glycemic outcomes. For patients prescribed multiple daily injections vs no insulin, the 12-month estimated change in HbA1c was 0.25% higher (95% CI, 0.02% to 0.47%; P = .03) for telemedicine vs in-person care. Comorbidities were not associated with HbA1c change in any cohort.

Conclusions and Relevance

In this cohort study of adults with T2D receiving endocrinology care, patients using telemedicine alone had inferior glycemic outcomes compared with patients who used in-person or mixed care. Additional strategies may be needed to support adults with T2D who rely on telemedicine alone to access endocrinology care, especially for those with complex treatment or elevated HbA1c.

Recruiting historically under-represented individuals into Project ECHO Diabetes: using barrier analysis to understand disparities in clinical research in the USA

OBJECTIVES

Individuals under-recruited in diabetes research studies include those not seen at endocrinology centres and those from rural, low socioeconomic and/or under-represented racial/ethnic groups. The purpose of this descriptive analysis is to detail recruitment and retention efforts of Project ECHO Diabetes clinical sites affiliated with Stanford University and University of Florida.

DESIGN

Prospective collection of participant engagement and qualitative analysis of barriers and facilitators of research engagement within Project ECHO Diabetes, a virtual tele-education programme for healthcare providers in the management of individuals with insulin-requiring diabetes.

SETTING

Data were collected at the patient level, provider level and clinic level between 1 May 2021 and 31 July 2022.

PARTICIPANTS

Participants and study personnel were recruited from 33 Project ECHO Diabetes sites in California and Florida.

OUTCOMES

We report study completion rates for participants recruited into 33 Project ECHO Diabetes sites. Using barrier analysis, a methodology designed for the real-time assessment of interventions and system processes to identify barriers and facilitators, study personnel identified significant barriers to recruitment and retention and mapped them to actionable solutions.

RESULTS

In total, 872 participants (California n=495, Florida n=377) were recruited with differing recruitment rates by site (California=52.7%, Florida=21.5%). Barrier analysis identified lack of trust, unreliable contact information, communication issues and institutional review board (IRB) requirements as key recruitment barriers. Culturally congruent staff, community health centre (CHC) support, adequate funding and consent process flexibility were solutions to address recruitment challenges. Barriers to retention were inconsistent postal access, haemoglobin A1c kit collection challenges, COVID-19 pandemic and broadband/connectivity issues. Additional funding supporting research staff and analogue communication methods were identified as solutions address barriers to retention.

CONCLUSIONS

Funded partnerships with CHCs, trusted by their local communities, were key in our recruitment and retention strategies. IRB consent process flexibility reduced barriers to recruitment. Recruiting historically under-represented populations is feasible with funding aimed to address structural barriers to research participation.

Effects of glucagon-like peptide-1 receptor agonists and sodium-glucose cotransporter-2 inhibitors on cardiovascular and kidney outcomes in Asian versus White patients with type 2 diabetes mellitus

BACKGROUND

The study aimed to assess the treatment effects of the two medications on cardiovascular and kidney outcomes in Asian compared with White patients with type 2 diabetes mellitus (T2DM).

METHODS

MEDLINE, EMBASE, and CENTRAL were searched up to October 31, 2022. We included the trials that assessed the effects of glucagon-like peptide-1 receptor agonists (GLP-1 RA) or sodium-glucose cotransporter-2 inhibitors (SGLT2i) versus placebo in Asian and White patients with T2DM on major adverse cardiovascular events (MACE) and kidney outcomes. The Bucher method was used to perform an indirect comparison for estimating the differences in treatment effects of GLP-1 RA and SGLT2i between Asian versus White patients. Interaction tests were also performed for treatment-by-race to assess the potential effect modification by race.

RESULTS

We included 22 publications from 13 randomized trials. For MACE, there were no differences in treatment effects of GLP-1 RA (HR = 0.84, 95% CI: 0.68-1.04) or SGLT2i (HR = 0.90, 95% CI: 0.72-1.13) in Asian versus White patients. No differences in treatment effects of SGLT2i on kidney outcomes in Asian versus White patients were found (HR = 1.01, 95% CI: 0.75-1.36). There was no significant effect modification by race on cardiovascular and kidney outcomes.

CONCLUSIONS

There were no significant differences in treatment effects of GLP-1 RA or SGLT2i for MACE between Asian and White patients with T2DM. Likewise, no significant differences in treatment effects of SGLT2i on kidney outcomes were found between Asian and White patients.