Sampling and recruitment
RECRUITMENT
This qualitative study included PCPs (Summary of BP-CHECK measurement methodsThe interviews analyzed for this paper focused on PCPs at Kaiser Permanente Washington who received ABPM results for a BP-CHECK study participant, to ensure they had some experience with this testing methodology. A purposive sampling matrix was used to prioritize recruitment of PCPs who received 2 or more ABPM patient reports with the goal of approximately 75% of participating PCPs receiving 2 or more ABPM reports. Invitations to participate and study information summaries were sent to PCPs via email, followed by at least 3 attempts at phone outreach if there was no response.