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Home > "A" Clinical Trials Conditions > Adherence to Antihypertensive Therapy--Data Analyses  Adherence to Antihypertensive Therapy--Data Analyses
Adherence to Antihypertensive Therapy--Data Analyses
For Condition: Cardiovascular Diseases,Hypertension
Status: Completed
Sponsor(s): National Heart, Lung, and Blood Institute (NHLBI) ,
Synopsis: To assess factors that may influence adherence to antihypertensive drug therapy.
Details: BACKGROUND: High blood pressure continues to be a highly prevalent condition affecting about 20 percent of the U.S. population. Untreated, it may lead to coronary heart disease, stroke, kidney failure, and other complications. Medication is a major means of controlling hypertension and averting these debilitating consequences. Treatment with drugs, however, is undermined by suboptimal adherence to therapy. Forgetting to take medications is the most commonly elicited reason for lapses in medication use; but side effects, health beliefs, lack of knowledge of disease and treatment instructions, and financial barriers may also interfere. Determining those factors that (1) are predictably associated with fluctuations in adherence (such as day of the week, holidays, medication appointments); (2) ameliorate the impact of nonadherence, such as pharmacologic properties of drugs that protect patients during adherence lapses; and (3) correlate with the accuracy of adherence reporting by patients will assist in anticipating and addressing adherence obstacles and serve as the objectives of the study. DESIGN NARRATIVE: The study uses data collected from electronic adherence monitors, questionnaires, and computerized medical records that contain blood pressure readings during a prior investigation of antihypertensive adherence. This earlier investigation involved 286 members of Harvard Pilgrim Health Care, a large New England managed care organization, who were on single drug therapy for mild to moderate hypertension and was conducted from 1994 to 1997. Objective 1 evaluates the impact of temporal factors such as weekend versus weekday, holidays, seasons, and impending medical appointments on adherence by analyzing their effects on the daily rate of dosing recorded by electronic medication monitors. Time trend models are used for this purpose. Objective 2 assesses the impact of pharmacologic duration of action on the level of antihypertensive adherence required to maintain a goal blood pressure of <140/90 mmHg. This involves determining if the relationship between adherence and blood pressure is modified by the duration of drug effect. Objective 3 concerning correlates of accuracy of reported adherence is approached by verifying reported adherence against electronically measured adherence. Predictors and correlates of accurately reported adherence such as patient age, gender, race/ethnicity, education, socioeconomic status, health beliefs, and measures of health status are then identified by cross tabulating and statistical modeling accurate reporting against these factors.
Eligibility:
Study Type: Observational, Defined Population, Retrospective Study
Minimum Age/Maximum Age: /
Genders: Male
Protocol Entry Criteria: No eligibility criteria
Total Enrollment:
Location and Contact Information:
Overall Study Official:
PeterChoo, , Brigham and Women's Hospital
Additional Information:
Study ID Numbers: 953;
Study Start Date: September 1999
Record last reviewed: May 2003
Additional information available at: clinicaltrials.gov
Clinicaltrials.gov Reference link: NCT00006552
Other Cardiovascular Diseases Studies:
1. Dietary Patterns, Sodium Intake and Blood Pressure (DASH - Sodium)
2. Adherence to Antihypertensive Therapy--Data Analyses
3. Jackson Heart Study (JHS)
4. Blood Sampling for Neurochemical and Genetic Testing
5. Improving Medication Adherence in Co morbid Conditions
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Adherence to Antihypertensive Therapy--Data Analyses
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