Summary: In patients with diabetes or prediabetes identified through electronic health records (EHR) recruitment, invitation and recruitment into a physical activity behavioral trial demonstrated lower participation rates among males, Hispanics, and Spanish speakers compared to females, non-Hispanics, and English speakers compared to differences across demographic groups including sex, ethnicity, and language, with no significant differences related to neighborhood deprivation levels.
| PICO | Description |
|---|---|
| Population | Patients with diabetes or prediabetes identified through electronic health records (EHR) recruitment. |
| Intervention | Invitation and recruitment into a physical activity behavioral trial targeting patients with diabetes or prediabetes. |
| Comparison | Differences in recruitment participation rates across demographic groups including sex (male vs female), ethnicity (Hispanic vs non-Hispanic), and language (Spanish vs English speakers). |
| Outcome | Lower participation rates observed among males, Hispanics, and Spanish speakers compared with other groups. No significant differences found related to neighborhood deprivation levels. |
Clinical Context
Clinical trials are the foundation of evidence-based medicine, yet their findings only generalize to populations similar to those studied. When certain demographic groups are systematically underrepresented in trials, we generate evidence that may not apply equally to everyone—a fundamental equity problem in healthcare research.
Behavioral interventions for diabetes and prediabetes, particularly physical activity programs, are among the most effective treatments available. The Diabetes Prevention Program demonstrated that lifestyle intervention reduces diabetes incidence by 58%. Yet if certain populations don’t enroll in these trials, we cannot confirm that results apply to them.
Hispanic/Latino populations face disproportionately high diabetes burden—prevalence is approximately 12% compared to 8% in non-Hispanic whites—making their inclusion in behavioral trials particularly important. Similarly, men with diabetes have higher cardiovascular mortality than women, yet consistently underparticipate in lifestyle interventions.
Clinical Pearls
1. Gender Gap Persists in Physical Activity Research: Men consistently underparticipate in lifestyle intervention trials despite having higher diabetes-related mortality. Male-specific recruitment strategies and intervention designs may be needed.
2. Language as Barrier, Not Just Ethnicity: Spanish speakers showed lower enrollment independent of Hispanic ethnicity, suggesting language-concordant recruitment materials and study procedures are essential.
3. Neighborhood Deprivation Didn’t Predict Non-Enrollment: Living in disadvantaged neighborhoods wasn’t associated with lower trial participation, challenging assumptions that low-income populations can’t participate in research.
4. EHR Recruitment Identifies Gaps: Using electronic health records to track invitations versus enrollment provides objective data on recruitment disparities that traditional self-referral recruitment cannot reveal.
Practical Application
For clinicians referring patients to behavioral programs, explicitly encourage male patients to participate—they may assume lifestyle programs are “for women.” Address potential barriers directly: flexibility in scheduling and remote participation options.
For Spanish-speaking patients, confirm that recommended programs offer Spanish-language materials. When language-concordant options aren’t available, acknowledge this limitation and advocate for program expansion.
For researchers designing diabetes behavioral trials, use proactive strategies: bilingual recruitment materials, male-targeted messaging, flexible participation options, and community partnerships.
Broader Evidence Context
Underrepresentation of minorities in clinical trials is a longstanding problem across medicine. Recent initiatives including NIH’s All of Us program aim to build more representative research cohorts. Studies examining Hispanic participation in diabetes prevention show culturally adapted interventions achieve similar or better outcomes when participants enroll.
Study Limitations
Single health system in one geographic region may not generalize. Reasons for non-enrollment weren’t captured. Binary sex categories may not capture gender identity complexity. Other factors like health literacy and insurance status weren’t fully examined.
Bottom Line
Men, Hispanics, and Spanish speakers are systematically underrepresented in diabetes behavioral trials, limiting generalizability. Language-concordant, culturally tailored, and gender-sensitive recruitment strategies are needed to build an evidence base that serves all patients equitably.
Source: Deborah Rohm Young, et al. “Sociodemographic characteristics of patients throughout the recruitment process into a randomized, controlled behavioral trial.” Read article.
