Table 1 Process evaluation (PE) components, sources, and type of data

Context and Reach

NHS GP practice data and trial data

Practice numbers and location. Demographic and socioeconomic characteristics of population served by the practice

Recruitment

Trial recruitment data

Routine trial data e.g., numbers recruited, number declined, eligible

Sample of expression of interest forms from those who declined to participate

Dose delivered

Trial intervention data

Numbers of groups delivered/not delivered and why, location of groups

Dose received

Trial intervention attendance sheets

Trial data

Attendance data

Reasons given for not attending

Fidelity

Intervention group audio recordings

Trial specific records of one-to-one consultations with participants

Audio recording data

10% form completion check for adherence

Experience of participating in the trial

Staff focus groups

Participant interviews

Participant feedback forms

GP feedback forms

Intervention staff focus group notes and recordings

Patient interview recordings / transcripts

Participant feedback

GP feedback