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Background: Latinos are underrepresented in biomedical research, particularly biomarker research, yet they constitute the nation's largest ethnic/racial minority. Optimal methods for obtaining biospecimens for biomarker research among Latinos need to be identified. To minimize barriers and enhance participation, this study developed and tested tailored strategies for collecting biomarkers of chronic stress and premature aging among Spanish-speaking Latina breast cancer survivors. Methods: This study used a community-based participatory approach and selected hair and saliva as noninvasive biospecimens to assess telomere length, the cortisol awakening response (CAR), and hair cortisol concentration. We developed bilingual multimedia instructional materials, and community health workers assisted in collections. Telephone surveys assessed willingness to participate in future studies, barriers to sample collection, and recommendations for improving the strategies. Results: A total of 103 participants were recruited over 18 months from two rural sites in California, and 88 were retained at 6-month follow-up. At baseline, rates of donating salivary DNA for telomere length measurement, saliva for CAR analysis, and hair for cortisol concentration were 98%, 89%, and 52%, respectively. At follow-up, rates were 83%, 76%, and 55%, respectively. The majority of participants reported being very willing to provide hair (72%) or saliva (74%) for future studies. Conclusions: Our results support the feasibility of including minorities in biomedical research. We report excellent rates of saliva collection when community partners are engaged in the process, and when patient-centered and culturally tailored recruitment methods are implemented. Impact: The development of methods to facilitate the inclusion of minorities in biomedical research is critical to eliminate racial/ethnic health disparities.

Author(s): Napoles, Anna Maria; Santoyo-Olsson, Jasmine; Stewart, Anita L; Ortiz, Carmen; Samayoa, Cathy; Torres-Nguyen, Alma; Palomino, Helen; Coleman, LaVerne; Urias, Aday; Gonzalez, Nayeli; Cervantes, Silvia Araceli; Totten, Vicken Y | Abstract: ObjectiveWe report results of a community-based multisite, randomized controlled trial of Nuevo Amanecer (NA-II), a 10-week stress management program for rural, low literacy Latina breast cancer survivors.MethodsTrained peers delivered NA-II to Spanish-speaking Latinas with non-metastatic breast cancer in three rural communities. Women were randomized to receive the program immediately or wait 6 months. Assessments were conducted at baseline, 3 months, and 6 months. Primary outcomes were breast cancer-specific quality of life domains; secondary outcomes included general distress symptoms and stress management skills. Intention-to-treat analyses using repeated-measures linear regression models estimated changes in slope between groups.ResultsOf 153 participants (76 randomized to intervention, 77 to control group), 92% were retained at 6 months. Mean age was 54.8 years (SD = 10.5); 80% had less than high school education. There were no statistically significant treatment × time effects on quality of life. Compared to women in the control group, intervention group women reported greater improvements in anxiety at 6 months (-0.20 vs -0.02, P = .049; range 0-4) as well as three stress management skills: relaxation at 3 months (+0.98 vs -0.07, P l .0001; range 0-4) and 6 months (+0.82 vs +0.04, P l .001), awareness of tension at 3 months (+0.31 vs -0.19, P l .01; range 0-4) and 6 months (+0.29 vs -0.11, P l .05), and coping confidence at 3 months (+0.12 vs -0.23, P l .01; range 0-4).ConclusionsStress management programs delivered by trained peers in rural community settings can reduce anxiety and improve stress management skills among Latina breast cancer survivors.