TABLE 1. The CCWG Subgroups Established to Conduct Project Task^a.

Subgroup	Tasks	Membership Composition
Research question	Draft CODI research questions Provide subject matter expertise to inform the gaps analysis between the PCORnet CDM and CODI research questions Draft CODI pilot use cases	Project management Health services researchers Childhood obesity subject matter experts Public health scientists and informaticians DHDN experts Clinicians
Programmatic environmental scan	Identified organizations to include in information-gathering activities Conducted outreach to organizations Summarized and presented information for CCWG decision making	Project management Childhood obesity intervention experts Pilot site implementation leads Evaluation expert
Technical environmental scan	Conducted crosswalk between concepts in the PCORnet CDM and CODI research questions Developed questions and conducted outreach to organizations for the scan Summarized and presented information for CCWG decision making	Project management Data science experts Pilot site implementation leads
Record linkage	Evaluated and summarized record linkage strategies to inform CCWG decision making Identified and evaluated open-source PPRL tools Developed evaluation criteria to assess performance of the PPRL tools	Project management Identity management experts Data science experts DHDN experts Pilot site implementation leads
Governance	Conducted gaps analysis of CHORDS governance functions and CODI governance needs and made recommendations to the CCWG about mitigation strategies Evaluated different data sharing and use agreement frameworks and recommended strategies to the CCWG Drafted the data sharing and use agreement Facilitated approvals by each organization's legal authorities	Project management Technical leads from each pilot organization Governance leads from each pilot organization DHDN governance experts
Evaluation plan	Identified key evaluation questions, goals, indicators, and metrics Recommended a prioritized implementation of the evaluation plan for the CODI pilot Developed data collection tools based upon the evaluation plan	Project management Evaluation experts Pilot site implementers
Implementation	Provided input and feedback on CODI solutions and implementation guides Tested and implemented CODI solutions	Project management Pilot site implementers

Abbreviations: CCWG, CODI Collaborative Work Group; CDM, common data model; CHORDS, Colorado Health Observation Regional Data Service; CODI, Childhood Obesity Data Initiative; DHDN, distributed health data network; PCORnet, National Patient-Centered Clinical Outcomes Research Network; PPRL, privacy-preserving record linkage.

^aThe project management team was responsible for facilitating meetings, developing draft materials for review and discussion, maintaining membership, and documenting decisions and recommendations. Subgroup members were expected to attend and actively participate in all meetings, share their expertise, and provide occasional review and offline feedback of materials in preparation for meetings.