Study Objective—To determine the relationship between poor adherence and self-efficacy or
social support after a pharmacist intervention.
Design—Post-hoc analysis of data from two randomized controlled trials of physician-
pharmacist collaborative interventions (6 and 9 mo, respectively) to improve blood pressure
control.
Setting—Eleven university-affiliated primary care clinics.
Patients—Five hundred eighty-four patients (aged 21-85 yrs) with uncontrolled primary
hypertension; 296 were in the intervention group and 288 were in the control group.
Intervention—Pharmacists provided intensified hypertension management and drug adherence
counseling to patients in the intervention group.
Measurements and Main Results—Social support and self-efficacy questionnaires were
administered at baseline and end-of-study visits. Patient adherence was monitored by using the
Morisky self-reported adherence questionnaire. Self-reported adherence scores improved
significantly in the control group (p=0.0053) but not in the intervention group; however,
adherence at baseline in both groups was high. There were small, but significant, improvements in self-efficacy (p