Study designs of evaluations included in the review
Randomised controlled trials (RCTs) were eligible for inclusion in the review.
Specific interventions included in the review
Studies that evaluated interventions that included HBPM were eligible for inclusion. Most of the included interventions were complex interventions that included the following elements in addition to HBPM: patient education; counselling on medication adherence by nurses, pharmacists, or through a telephone-linked systems; timed medication reminders; monthly home visits; and nurse case management. In the included studies, the duration of the interventions ranged from 6 weeks to 1 year.
Participants included in the review
Studies of patients with hypertension were eligible for inclusion. Where reported, the included studies recruited patients from various settings including shopping malls, community or retirement centres, a worksite, hospital-based clinics or tertiary care, and primary care practices.
Outcomes assessed in the review
Studies that measured antihypertensive medication adherence using electronic methods, self-report, pill counts or pharmacy refills were eligible for inclusion. In the review, adherence to medication was defined as the taking of at least 80% of the prescribed medication. The majority of the included studies used pill counts to measure medication adherence.
How were decisions on the relevance of primary studies made?
Two reviewers independently selected the studies and resolved any differences by discussion.