Does reducing physician uncertainty improve hypertension control?: rationale and methods.

Area of Science:

• Cardiovascular Medicine
• Primary Care
• Health Services Research

Background:

• Hypertension affects one-third of US adults, with significant undertreatment and uncontrolled blood pressure (BP) in 43% of treated patients.
• Prevalence increases with age, disproportionately affecting Black populations, where 48% remain uncontrolled on treatment.
• Physician uncertainty about usual BP and medication adherence acts as a barrier to effective hypertension management.

Purpose of the Study:

• To test an intervention designed to reduce physician uncertainty regarding patient BP and medication adherence.
• To evaluate the impact of this intervention on achieving target BP control (<140/90 mm Hg or <130/80 mm Hg if diabetic).

Main Methods:

• Cluster randomization of 10 primary care clinics into intervention (n=5) or usual care (n=5) groups.
• Intervention clinics provided physicians with patient BP graphs, adherence assessment tools (electronic caps), and lifestyle/medication counseling.
• Patients (n=680) were recruited, with primary endpoint being proportion achieving BP control.

Main Results:

• Analyses of baseline data are in progress; patient closeout is expected March 2009.
• The study will assess changes in BP control, adherence, physician prescribing, and communication patterns.
• Office-based BP measurement error and physician/patient beliefs are being investigated as factors limiting BP control.

Conclusions:

• The trial will determine if novel technologies can improve physician prescribing and patient adherence for better hypertension control.
• Findings may inform strategies to overcome barriers in achieving optimal blood pressure management in primary care settings.
• Reducing physician uncertainty through enhanced data and tools shows promise for improving hypertension outcomes.