Implications
RECRUITMENT
The findings from the study reveal a more nuanced understanding of using email as a digital health study recruitment tool. While there is no definitive recruitment strategy that fully addresses diversity shortcomings in digital health studies, the email campaign has demonstrated effective recruitment of certain underrepresented groups (eg, older adults and women) in contrast to prior studies that included email [Finally, recruitment is only the beginning of the digital research study life cycle. Retention and engagement of enrolled underrepresented participants throughout a study’s life course are equally important for generating equitable health discoveries and benefits. Digital research studies need to be inclusive by design and supported in ongoing initiatives to achieve equity at all stages of participation. For the next generation of “precision population health” eCohort studies, such as the NIH’s one-million-person 