Table 2.

Quantitative data for the process evaluation

Process evaluation theme	Variable	Data source	Timepoint
Implementation	Planned medication escalations	Patient medical notes	Post 12-month follow-up
	N of medication escalation recommendations per prescriber	Objective data automatically recorded by intervention software	Throughout study
	N and dates of medication escalations initiated	Patient medical notes	Post 12-month follow-up
	Method for contacting patients re medication escalation	Patient medical notes	Post 12-month follow-up
	N of support emails sent to patients via HOME BP	Objective data automatically recorded by intervention software	Post 12-month follow-up
Mechanisms	Self-efficacy to implement the intervention procedures	3-item self-report questionnaire (Additional file 4)	Pre and post training module at baseline
	Outcome expectancies about the intervention	6-item self-report questionnaire (Additional file 4)	Pre and post training module at baseline
	Perceived acceptability of the intervention for patients	3-item self-report questionnaire (Additional file 4)	Pre and post training module at baseline
Contextual factors	Systolic and diastolic blood pressure readings entered by patient	Objective data automatically recorded by intervention software	Throughout study
	N of blood pressure entries and n of medication escalation recommendations per patient	Objective data automatically recorded by intervention software	Throughout study
	Patient age	Objective data automatically recorded by intervention software	Baseline
	Patient blood pressure targets: a) Standard (135/85 mmHg) b) Adjusted due to diabetes (135/75 mmHg) c) Adjusted due to age (145/85 mmHg if aged over 80 years)	Objective data automatically recorded by intervention software	Baseline