Research to eliminate health disparities in the United States is best approached from the perspec... more Research to eliminate health disparities in the United States is best approached from the perspective of population health. The objectives of this paper are to: (a) describe how ongoing research at the eight national Centers for Population Health and Health Disparities (CPHHD) is using a population health perspective and a community-based approach to advance the field of health disparities research; and (b) to discuss potential implications of such research for health policies that target some of the determinants of population health.
Hypertension affects almost 50 million people in the United States. Although the threshold of ele... more Hypertension affects almost 50 million people in the United States. Although the threshold of elevated blood pressure (BP) traditionally has been 140/90 mm Hg, recent recommendations for high-risk patients, such as those with kidney disease, heart failure, coronary artery disease, dia- betes mellitus, and heavy proteinuria, target BP levels well below 140/90 mm Hg. In this article, the special populations
Hypertension is a major public health problem in the U.S. Salt sensitivity is an important factor... more Hypertension is a major public health problem in the U.S. Salt sensitivity is an important factor associated with hypertension and its complications, yet it has not been addressed in the nursing literature. Salt sensitivity is a directionally appropriate rise or fall in blood pressure when salt is added or removed, respectively. The change in blood pressure in salt-sensitive subjects occurs to a degree exceeding random blood pressure fluctuations. Salt sensitivity is present in 30% of normotensive and over 50% of hypertensive persons. It is more prevalent among African Americans, older persons, and individuals with renal insufficiency or diabetes. This paper provides nurses with an overview of salt sensitivity and its significance in hypertension. It presents conceptual and operational definitions of salt sensitivity, identifies factors contributing to its development, and describes implications for nursing practice.
This exploratory study examined the relationship of gender and racism-related vigilance to baseli... more This exploratory study examined the relationship of gender and racism-related vigilance to baseline and task-induced changes in large arterial elasticity (LAE). The convenience sample consisted of 153 black youth (M age = 11.5 years, SD = 1.4) who were normotensive. Large arterial elasticity was measured via pulse wave contour analysis, before, during, and after a sequentially administered digit forward and digit backward task. Racism-related vigilance was reported by participants. Although findings from general linear models indicated that the independent effects of gender and racism-related vigilance were not significantly related to LAE (baseline, reactivity, or recovery) (all p > .05), these analyses showed that gender and racism-related vigilance interacted to predict baseline LAE (p < .02) and task-induced changes (reactivity only) in LAE (p < .006). Follow-up regression analyses explicating the pattern of these interaction effects indicated that 1) racism-related vigilance was marginally and inversely related to baseline LAE among boys (p < .06) but not in girls (p > .21); and, 2) racism-related vigilance was positively and significantly associated with task-induced changes (reactivity) in LAE among boys (p < .008) but not in girls (p > .30). The relationship between racism-related vigilance and LAE varies as a function of gender, and may have longer-term implications for between and within-group disparities in cardiovascular health.
Recently, clinical trial data showed that rapid attainment of goal blood pressure (BP) reduces th... more Recently, clinical trial data showed that rapid attainment of goal blood pressure (BP) reduces the risk for cardiovascular disease (CVD) events. It is unknown whether patient characteristics linked to the magnitude of CVD risk influence the speed of BP control. Time to attain goal systolic BP (SBP) in Kaplan-Meier survival curves was contrasted for strata of baseline characteristics and intensity of hypertension treatment. Survival analyses showed that albuminuria, diabetes, increased body mass index, millimeters of mercury above Joint National Committee (JNC) SBP goal, higher Framingham risk score, older age, depressed estimated glomerular filtration rate, and greater intensity of antihypertensive drug treatment all predicted slower JNC SBP goal attainment (P < 0.015); the intensity of antihypertensive drug therapy when goal BP was attained was also greater in all conditions linked to slow goal attainment. Cox proportional hazards model that included the above patient characteristics revealed all characteristics slowed attainment of JNC SBP goals (P < 0.03). Thus, patient characteristics influence speed of BP control and practitioners should avoid therapeutic inertia.
Clinical journal of the American Society of Nephrology : CJASN, Jan 11, 2015
The Chronic Renal Insufficiency Cohort (CRIC) Study is a United States multicenter, prospective s... more The Chronic Renal Insufficiency Cohort (CRIC) Study is a United States multicenter, prospective study of racially and ethnically diverse patients with CKD. Although the original aims of the study were to identify novel predictors of CKD progression and to elucidate the risk and manifestations of cardiovascular disease among nearly 4000 individuals with CKD, the CRIC Study has evolved into a national resource for investigation of a broad spectrum of CKD-related topics. The study has produced >90 published scientific articles, promoted many young investigative careers in nephrology, and fostered international collaborations focused on understanding the global burden of CKD. The third phase of the CRIC Study will complete enrollment of 1500 additional study participants in 2015 and is designed to answer questions regarding morbidity and mortality in mild-to-moderate CKD and to assess the burden of CKD in older persons. This review highlights some of the salient findings of the CRIC ...
Long-term adherence or compliance with anti- hypertensive drug therapy is poor. It has been estim... more Long-term adherence or compliance with anti- hypertensive drug therapy is poor. It has been estimated that within the first year of treatment 16-50% of hyper- tensives discontinue their anti-hypertensive medications. Even among those who remain on therapy long term, missed medication doses are common. Epidemiological studies have shown that drug-treated hypertensives have higher blood pressures than age-, gender- and body
Journal of the American College of Cardiology, Jan 7, 2015
Results of the SYMPLICITY HTN-3 (Renal Denervation in Patients With Uncontrolled Hypertension) tr... more Results of the SYMPLICITY HTN-3 (Renal Denervation in Patients With Uncontrolled Hypertension) trial confirmed the safety but not the efficacy of renal denervation for treatment-resistant hypertension at 6 months post procedure. This study sought to analyze the 12-month SYMPLICITY HTN-3 results for the original denervation group, the sham subjects who underwent denervation after the 6-month endpoint (crossover group), and the sham subjects who did not undergo denervation after 6 months (non-crossover group). Eligible subjects were randomized 2:1 to denervation or sham procedure. Subjects were unblinded to their treatment group after the 6-month primary endpoint was ascertained; subjects in the sham group meeting eligibility requirements could undergo denervation. Change in blood pressure (BP) at 12 months post randomization (6 months for crossover subjects) was analyzed. The 12-month follow-up was available for 319 of 361 denervation subjects and 48 of 101 non-crossover subjects; 6-...
The high Na/low K environment of modern society is related to the genesis of hypertension and str... more The high Na/low K environment of modern society is related to the genesis of hypertension and stroke. There is prior evidence of racial, geographical, and social class differences in Na and K intake and blood pressure. Baseline data from the Treatment of Mild Hypertension Study (TOMHS) was used to assess urinary Na and K excretion profiles by race, clinic geographic area, and education. Participants were adult black and white hypertensive patients from the Birmingham, Alabama, and Chicago, Illinois, area. Level of education was categorized as: less than college graduate and college graduate or more. Two overnight urine samples were collected and analyzed for Na and K at entry from 154 blacks and 281 whites. The urinary Na:K ratio was significantly higher in both blacks (5.1 v 3.8, P < .001) and whites (4.1 v 3.4, P < .005) in Birmingham compared with Chicago. This was primarily due to the lower excretion of urinary K in blacks (12.8 v 16.9 mmol/8 h, P < .01) and whites (14....
A total of 31 healthy volunteers [39 +/- 7 (SD) years] and 18 untreated essential hypertensive su... more A total of 31 healthy volunteers [39 +/- 7 (SD) years] and 18 untreated essential hypertensive subjects [43 +/- 9 years] collected urine for 24 h after a physical examination and laboratory tests. Radioimmunoassay measurements of angiotensin-(1-7) [Ang-(1-7)] in urine and plasma were done as described previously. Sitting systolic and diastolic blood pressures (+/- SD) averaged 118 +/- 11/74 +/- 7 mm Hg and 146 +/- 16/96 +/- 8 mm Hg in normal and essential hypertensive subjects, respectively (P < .001), whereas 24 h urinary volume was not different in normal and essential hypertensive subjects (P > .05). The concentration of Ang-(1-7) in the urine of normal subjects averaged 62.6 +/- 22.6 pmol/L corresponding to a urinary excretion rate of 98.9 +/- 44.7 pmol/24 h. Concurrent measurements of plasma Ang-(1-7) showed that the content of Ang-(1-7) in urine was 2.5-fold higher than that measured in the plasma. In contrast, untreated essential hypertensive subjects had lower concentr...
Research to eliminate health disparities in the United States is best approached from the perspec... more Research to eliminate health disparities in the United States is best approached from the perspective of population health. The objectives of this paper are to: (a) describe how ongoing research at the eight national Centers for Population Health and Health Disparities (CPHHD) is using a population health perspective and a community-based approach to advance the field of health disparities research; and (b) to discuss potential implications of such research for health policies that target some of the determinants of population health.
Hypertension affects almost 50 million people in the United States. Although the threshold of ele... more Hypertension affects almost 50 million people in the United States. Although the threshold of elevated blood pressure (BP) traditionally has been 140/90 mm Hg, recent recommendations for high-risk patients, such as those with kidney disease, heart failure, coronary artery disease, dia- betes mellitus, and heavy proteinuria, target BP levels well below 140/90 mm Hg. In this article, the special populations
Hypertension is a major public health problem in the U.S. Salt sensitivity is an important factor... more Hypertension is a major public health problem in the U.S. Salt sensitivity is an important factor associated with hypertension and its complications, yet it has not been addressed in the nursing literature. Salt sensitivity is a directionally appropriate rise or fall in blood pressure when salt is added or removed, respectively. The change in blood pressure in salt-sensitive subjects occurs to a degree exceeding random blood pressure fluctuations. Salt sensitivity is present in 30% of normotensive and over 50% of hypertensive persons. It is more prevalent among African Americans, older persons, and individuals with renal insufficiency or diabetes. This paper provides nurses with an overview of salt sensitivity and its significance in hypertension. It presents conceptual and operational definitions of salt sensitivity, identifies factors contributing to its development, and describes implications for nursing practice.
This exploratory study examined the relationship of gender and racism-related vigilance to baseli... more This exploratory study examined the relationship of gender and racism-related vigilance to baseline and task-induced changes in large arterial elasticity (LAE). The convenience sample consisted of 153 black youth (M age = 11.5 years, SD = 1.4) who were normotensive. Large arterial elasticity was measured via pulse wave contour analysis, before, during, and after a sequentially administered digit forward and digit backward task. Racism-related vigilance was reported by participants. Although findings from general linear models indicated that the independent effects of gender and racism-related vigilance were not significantly related to LAE (baseline, reactivity, or recovery) (all p &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;gt; .05), these analyses showed that gender and racism-related vigilance interacted to predict baseline LAE (p &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;lt; .02) and task-induced changes (reactivity only) in LAE (p &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;lt; .006). Follow-up regression analyses explicating the pattern of these interaction effects indicated that 1) racism-related vigilance was marginally and inversely related to baseline LAE among boys (p &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;lt; .06) but not in girls (p &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;gt; .21); and, 2) racism-related vigilance was positively and significantly associated with task-induced changes (reactivity) in LAE among boys (p &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;lt; .008) but not in girls (p &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;gt; .30). The relationship between racism-related vigilance and LAE varies as a function of gender, and may have longer-term implications for between and within-group disparities in cardiovascular health.
Recently, clinical trial data showed that rapid attainment of goal blood pressure (BP) reduces th... more Recently, clinical trial data showed that rapid attainment of goal blood pressure (BP) reduces the risk for cardiovascular disease (CVD) events. It is unknown whether patient characteristics linked to the magnitude of CVD risk influence the speed of BP control. Time to attain goal systolic BP (SBP) in Kaplan-Meier survival curves was contrasted for strata of baseline characteristics and intensity of hypertension treatment. Survival analyses showed that albuminuria, diabetes, increased body mass index, millimeters of mercury above Joint National Committee (JNC) SBP goal, higher Framingham risk score, older age, depressed estimated glomerular filtration rate, and greater intensity of antihypertensive drug treatment all predicted slower JNC SBP goal attainment (P &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;lt; 0.015); the intensity of antihypertensive drug therapy when goal BP was attained was also greater in all conditions linked to slow goal attainment. Cox proportional hazards model that included the above patient characteristics revealed all characteristics slowed attainment of JNC SBP goals (P &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;lt; 0.03). Thus, patient characteristics influence speed of BP control and practitioners should avoid therapeutic inertia.
Clinical journal of the American Society of Nephrology : CJASN, Jan 11, 2015
The Chronic Renal Insufficiency Cohort (CRIC) Study is a United States multicenter, prospective s... more The Chronic Renal Insufficiency Cohort (CRIC) Study is a United States multicenter, prospective study of racially and ethnically diverse patients with CKD. Although the original aims of the study were to identify novel predictors of CKD progression and to elucidate the risk and manifestations of cardiovascular disease among nearly 4000 individuals with CKD, the CRIC Study has evolved into a national resource for investigation of a broad spectrum of CKD-related topics. The study has produced >90 published scientific articles, promoted many young investigative careers in nephrology, and fostered international collaborations focused on understanding the global burden of CKD. The third phase of the CRIC Study will complete enrollment of 1500 additional study participants in 2015 and is designed to answer questions regarding morbidity and mortality in mild-to-moderate CKD and to assess the burden of CKD in older persons. This review highlights some of the salient findings of the CRIC ...
Long-term adherence or compliance with anti- hypertensive drug therapy is poor. It has been estim... more Long-term adherence or compliance with anti- hypertensive drug therapy is poor. It has been estimated that within the first year of treatment 16-50% of hyper- tensives discontinue their anti-hypertensive medications. Even among those who remain on therapy long term, missed medication doses are common. Epidemiological studies have shown that drug-treated hypertensives have higher blood pressures than age-, gender- and body
Journal of the American College of Cardiology, Jan 7, 2015
Results of the SYMPLICITY HTN-3 (Renal Denervation in Patients With Uncontrolled Hypertension) tr... more Results of the SYMPLICITY HTN-3 (Renal Denervation in Patients With Uncontrolled Hypertension) trial confirmed the safety but not the efficacy of renal denervation for treatment-resistant hypertension at 6 months post procedure. This study sought to analyze the 12-month SYMPLICITY HTN-3 results for the original denervation group, the sham subjects who underwent denervation after the 6-month endpoint (crossover group), and the sham subjects who did not undergo denervation after 6 months (non-crossover group). Eligible subjects were randomized 2:1 to denervation or sham procedure. Subjects were unblinded to their treatment group after the 6-month primary endpoint was ascertained; subjects in the sham group meeting eligibility requirements could undergo denervation. Change in blood pressure (BP) at 12 months post randomization (6 months for crossover subjects) was analyzed. The 12-month follow-up was available for 319 of 361 denervation subjects and 48 of 101 non-crossover subjects; 6-...
The high Na/low K environment of modern society is related to the genesis of hypertension and str... more The high Na/low K environment of modern society is related to the genesis of hypertension and stroke. There is prior evidence of racial, geographical, and social class differences in Na and K intake and blood pressure. Baseline data from the Treatment of Mild Hypertension Study (TOMHS) was used to assess urinary Na and K excretion profiles by race, clinic geographic area, and education. Participants were adult black and white hypertensive patients from the Birmingham, Alabama, and Chicago, Illinois, area. Level of education was categorized as: less than college graduate and college graduate or more. Two overnight urine samples were collected and analyzed for Na and K at entry from 154 blacks and 281 whites. The urinary Na:K ratio was significantly higher in both blacks (5.1 v 3.8, P < .001) and whites (4.1 v 3.4, P < .005) in Birmingham compared with Chicago. This was primarily due to the lower excretion of urinary K in blacks (12.8 v 16.9 mmol/8 h, P < .01) and whites (14....
A total of 31 healthy volunteers [39 +/- 7 (SD) years] and 18 untreated essential hypertensive su... more A total of 31 healthy volunteers [39 +/- 7 (SD) years] and 18 untreated essential hypertensive subjects [43 +/- 9 years] collected urine for 24 h after a physical examination and laboratory tests. Radioimmunoassay measurements of angiotensin-(1-7) [Ang-(1-7)] in urine and plasma were done as described previously. Sitting systolic and diastolic blood pressures (+/- SD) averaged 118 +/- 11/74 +/- 7 mm Hg and 146 +/- 16/96 +/- 8 mm Hg in normal and essential hypertensive subjects, respectively (P < .001), whereas 24 h urinary volume was not different in normal and essential hypertensive subjects (P > .05). The concentration of Ang-(1-7) in the urine of normal subjects averaged 62.6 +/- 22.6 pmol/L corresponding to a urinary excretion rate of 98.9 +/- 44.7 pmol/24 h. Concurrent measurements of plasma Ang-(1-7) showed that the content of Ang-(1-7) in urine was 2.5-fold higher than that measured in the plasma. In contrast, untreated essential hypertensive subjects had lower concentr...
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