Prevalence, treatment, and control of hypertension among African Americans and Caucasians at primary care sites for medically under-served patients.
BACKGROUND
Hypertension is a major contributor to ethnic disparities in cardiovascular disease, especially among low-income African Americans in the southeast United States.


OBJECTIVE
To assess differences between African Americans and Caucasians in the prevalence, treatment, and control of hypertension in outpatient clinics for under-served patients in South Carolina.


METHODS
A random sample of outpatient charts on 7795 adults was abstracted from 31 primary care clinics providing health care for approximately 180,000 medically under-served patients. Variables included visit dates, blood pressures (BP), diagnosis of hypertension, and medications.


RESULTS
Data were abstracted from outpatient medical records on 4694 African Americans (1483 men, 3195 women, 16 gender unknown, age 46.8 +/- 0.3 years) and 2540 Caucasians (1031 men, 1492 women, 17 gender unknown, age 47.7 +/- 0.4 years). The prevalence of hypertension was greater in African Americans than Caucasians (47.6% vs 31.0%, P < .001). The percentages of hypertensive African Americans and Caucasians receiving BP medications were similar (83.4% vs 81.6%, P=NS). Although African-American hypertensives were more likely than Caucasian hypertensives to receive diuretics and calcium channel blockers and less likely to receive beta-blockers, the number of BP medications was similar for both groups (1.44 +/- 0.02 vs 1.40 +/- 0.04, P=NS). Despite comparable treatment, African Americans were less likely than Caucasians to have BP controlled to <140/90 mm Hg at the most recent clinic visit (40.9% vs 46.3%, P=.01).


CONCLUSIONS
In healthcare settings for medically under-served patients, the greater prevalence and lesser control of hypertension, despite similar treatment intensity, may contribute to higher rates of cardiovascular disease among African Americans than Caucasians.
Sheats
Nina
N
Summer Undergraduate Research Training Program, College of Medicine, Medical University of South Carolina, Charleston, South Carolina 29425, USA.
Lin
Yan
Y
Zhao
Wenle
W
Cheek
DeAnna E
DE
Lackland
Daniel T
DT
Egan
Brent M
BM
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000959:Antihypertensive Agents / Q000627:therapeutic use; D044383:Black People; D016009:Chi-Square Distribution; D005260:Female; D006801:Humans; D006973:Hypertension / Q000453:epidemiology / Q000208:ethnology* / Q000517:prevention & control*; D008297:Male; D008507:Medically Underserved Area; D008875:Middle Aged; D015995:Prevalence; D011320:Primary Health Care; D013022:South Carolina / Q000453:epidemiology; D044465:White People; D001741:Black or African American
D000959:Antihypertensive Agents