data are available to all COGA investigators while additional data are harmonized across the various waves of data collection as the analytic needs of investigators arise—for instance, while some research questions may require the cross‐sectional coding of a lifetime measure of suicidal ideation, another may entail the study of repeated assessments of suicidal ideation in past 12 months. However, all data are connected to a specific study participant via this common “id” variable regardless of longitudinal wave or phase of data collection (data are further anonymized prior to sharing with repositories or external collaborators). Further synergy across the diverse expertise of COGA members, which includes epidemiologists, psychologists, clinicians, geneticists, neuroscientists, statisticians, and molecular and cellular biologists, is generated by monthly meetings, both within data modalities and a single meeting of all COGA investigators, which allows for all aspects of COGA to benefit from the collective insights of this community of scientists. These meetings have been critical in empowering investigators to incorporate a data modality into their COGA analyses that they may be typically unfamiliar with, by partnering with a field expert and utilizing shared resources for data harmonization, code and protocol documents. The participation of all COGA investigators at these
