Issues and solutions for collecting biological specimen in longitudinal studies: Experience from the community child health network research network

The inclusion of biomarkers in studies of stress and health outcomes is of growing interest, including for community-based participatory research (CBPR) studies. Yet the perspectives of participants and communities have been infrequently consulted to inform the biomarker collection process. The objective of this paper is to describe the process and outcomes of using CBPR in framing biomarker collection in a study of allostatic load in a maternal and child health population. Through analysis of focus group data, we identify aspects of CBPR that facilitate increased community trust and endorsement related to collecting biological samples, and also provide a community perspective that is often overlooked in the literature. We found that a CBPR approach facilitated greater understanding among community members about the importance of biomarkers, while simultaneously informing the design of a biomarker data collection protocol that was responsive to the desired scope and data collection procedures that reflected community priorities.