Baseline Characteristics of Participants in the African American Study of Kidney Disease and Hypertension (AASK) Clinical Trial and Cohort Study

Mohammed Sika, Julia Lewis, Janice Douglas, Thomas Erlinger, Donna Dowie, Michael Lipkowitz, James Lash, Denise Cornish-Zirker, Gail Peterson, Robert Toto, John Kusek, Lawrence Appel, Cynthia Kendrick, Jennifer Gassman

Research output: Contribution to journalArticle

35 Citations (Scopus)

Abstract

Background: African Americans are at increased risk of kidney failure caused by hypertension. The primary objective of the African American Study of Kidney Disease and Hypertension (AASK) Cohort Study is to identify risk factors for progressive kidney disease in African Americans with hypertensive chronic kidney disease in the setting of recommended antihypertensive therapy. Study Design, Setting, & Participants: On completion of the AASK Trial, a randomized, double-blind, 3 × 2 factorial trial, participants who had not yet begun dialysis treatment or undergone kidney transplantation were invited to enroll in a prospective Cohort Study. Cohort Study participants received recommended antihypertensive drug therapy, including high rates of angiotensin-converting enzyme-inhibitor (73%) and angiotensin receptor blocker (10%) use with a blood pressure goal of less than 130/80 mm Hg. Predictor, Outcomes, & Measurements: Baseline clinical and demographic characteristics are described separately at the baseline of the AASK Trial and Cohort Study. Results: Of 1,094 persons enrolled in the AASK Trial (June 1995 to September 2001; mean age, 55 years; 61% men), 691 enrolled in the AASK Cohort Study (April 2002 to present), 299 died or reached dialysis therapy or transplantation, and 104 declined to participate in the AASK Cohort Study. Mean baseline systolic/diastolic blood pressures were 150/96 mm Hg in the Trial and 136/81 mm Hg in the Cohort Study. Cohort Study participants had greater serum creatinine levels at the start of the Cohort Study (2.3 versus 1.8 mg/dL [203 versus 159 μmol/L]), corresponding to an estimated glomerular filtration rate of 43.8 versus 50.3 mL/min/1.73 m2 (0.73 versus 0.84 mL/s/1.73 m2), than Trial participants and greater urine protein-creatinine ratios (0.38 versus 0.19 mg/mg, respectively). Individuals who were eligible, but declined to participate in the Cohort Study, had greater systolic blood pressure, but similar kidney function. Limitations: Some parameters, such as iothalamate glomerular filtration rate, urinary albumin level, echocardiogram, and ambulatory blood pressure, were not performed in both the Trial and the Cohort Study, limiting the ability to evaluate changes in these parameters over time. Conclusion: Despite well-controlled blood pressure in the AASK Trial, Cohort Study participants still had evidence of progressive chronic kidney disease. Thus, the AASK Cohort Study is well positioned to address its primary objective.

Original languageEnglish (US)
JournalAmerican Journal of Kidney Diseases
Volume50
Issue number1
DOIs
StatePublished - Jul 2007

Fingerprint

Kidney Diseases
African Americans
Cohort Studies
Clinical Trials
Hypertension
Blood Pressure
Glomerular Filtration Rate
Chronic Renal Insufficiency
Clinical Studies
Antihypertensive Agents
Dialysis
Creatinine
Iothalamic Acid
Angiotensin Receptor Antagonists
Angiotensin-Converting Enzyme Inhibitors
Kidney Transplantation
Renal Insufficiency
Albumins
Therapeutics
Transplantation

Keywords

  • African Americans
  • baseline
  • hypertension
  • kidney disease

ASJC Scopus subject areas

  • Nephrology

Cite this

Baseline Characteristics of Participants in the African American Study of Kidney Disease and Hypertension (AASK) Clinical Trial and Cohort Study. / Sika, Mohammed; Lewis, Julia; Douglas, Janice; Erlinger, Thomas; Dowie, Donna; Lipkowitz, Michael; Lash, James; Cornish-Zirker, Denise; Peterson, Gail; Toto, Robert; Kusek, John; Appel, Lawrence; Kendrick, Cynthia; Gassman, Jennifer.

In: American Journal of Kidney Diseases, Vol. 50, No. 1, 07.2007.

Research output: Contribution to journalArticle

Sika, M, Lewis, J, Douglas, J, Erlinger, T, Dowie, D, Lipkowitz, M, Lash, J, Cornish-Zirker, D, Peterson, G, Toto, R, Kusek, J, Appel, L, Kendrick, C & Gassman, J 2007, 'Baseline Characteristics of Participants in the African American Study of Kidney Disease and Hypertension (AASK) Clinical Trial and Cohort Study', American Journal of Kidney Diseases, vol. 50, no. 1. https://doi.org/10.1053/j.ajkd.2007.03.004
Sika, Mohammed ; Lewis, Julia ; Douglas, Janice ; Erlinger, Thomas ; Dowie, Donna ; Lipkowitz, Michael ; Lash, James ; Cornish-Zirker, Denise ; Peterson, Gail ; Toto, Robert ; Kusek, John ; Appel, Lawrence ; Kendrick, Cynthia ; Gassman, Jennifer. / Baseline Characteristics of Participants in the African American Study of Kidney Disease and Hypertension (AASK) Clinical Trial and Cohort Study. In: American Journal of Kidney Diseases. 2007 ; Vol. 50, No. 1.
@article{1d66344bda974767899c7a072e49a9f1,
title = "Baseline Characteristics of Participants in the African American Study of Kidney Disease and Hypertension (AASK) Clinical Trial and Cohort Study",
abstract = "Background: African Americans are at increased risk of kidney failure caused by hypertension. The primary objective of the African American Study of Kidney Disease and Hypertension (AASK) Cohort Study is to identify risk factors for progressive kidney disease in African Americans with hypertensive chronic kidney disease in the setting of recommended antihypertensive therapy. Study Design, Setting, & Participants: On completion of the AASK Trial, a randomized, double-blind, 3 × 2 factorial trial, participants who had not yet begun dialysis treatment or undergone kidney transplantation were invited to enroll in a prospective Cohort Study. Cohort Study participants received recommended antihypertensive drug therapy, including high rates of angiotensin-converting enzyme-inhibitor (73{\%}) and angiotensin receptor blocker (10{\%}) use with a blood pressure goal of less than 130/80 mm Hg. Predictor, Outcomes, & Measurements: Baseline clinical and demographic characteristics are described separately at the baseline of the AASK Trial and Cohort Study. Results: Of 1,094 persons enrolled in the AASK Trial (June 1995 to September 2001; mean age, 55 years; 61{\%} men), 691 enrolled in the AASK Cohort Study (April 2002 to present), 299 died or reached dialysis therapy or transplantation, and 104 declined to participate in the AASK Cohort Study. Mean baseline systolic/diastolic blood pressures were 150/96 mm Hg in the Trial and 136/81 mm Hg in the Cohort Study. Cohort Study participants had greater serum creatinine levels at the start of the Cohort Study (2.3 versus 1.8 mg/dL [203 versus 159 μmol/L]), corresponding to an estimated glomerular filtration rate of 43.8 versus 50.3 mL/min/1.73 m2 (0.73 versus 0.84 mL/s/1.73 m2), than Trial participants and greater urine protein-creatinine ratios (0.38 versus 0.19 mg/mg, respectively). Individuals who were eligible, but declined to participate in the Cohort Study, had greater systolic blood pressure, but similar kidney function. Limitations: Some parameters, such as iothalamate glomerular filtration rate, urinary albumin level, echocardiogram, and ambulatory blood pressure, were not performed in both the Trial and the Cohort Study, limiting the ability to evaluate changes in these parameters over time. Conclusion: Despite well-controlled blood pressure in the AASK Trial, Cohort Study participants still had evidence of progressive chronic kidney disease. Thus, the AASK Cohort Study is well positioned to address its primary objective.",
keywords = "African Americans, baseline, hypertension, kidney disease",
author = "Mohammed Sika and Julia Lewis and Janice Douglas and Thomas Erlinger and Donna Dowie and Michael Lipkowitz and James Lash and Denise Cornish-Zirker and Gail Peterson and Robert Toto and John Kusek and Lawrence Appel and Cynthia Kendrick and Jennifer Gassman",
year = "2007",
month = "7",
doi = "10.1053/j.ajkd.2007.03.004",
language = "English (US)",
volume = "50",
journal = "American Journal of Kidney Diseases",
issn = "0272-6386",
publisher = "W.B. Saunders Ltd",
number = "1",

}

TY - JOUR

T1 - Baseline Characteristics of Participants in the African American Study of Kidney Disease and Hypertension (AASK) Clinical Trial and Cohort Study

AU - Sika, Mohammed

AU - Lewis, Julia

AU - Douglas, Janice

AU - Erlinger, Thomas

AU - Dowie, Donna

AU - Lipkowitz, Michael

AU - Lash, James

AU - Cornish-Zirker, Denise

AU - Peterson, Gail

AU - Toto, Robert

AU - Kusek, John

AU - Appel, Lawrence

AU - Kendrick, Cynthia

AU - Gassman, Jennifer

PY - 2007/7

Y1 - 2007/7

N2 - Background: African Americans are at increased risk of kidney failure caused by hypertension. The primary objective of the African American Study of Kidney Disease and Hypertension (AASK) Cohort Study is to identify risk factors for progressive kidney disease in African Americans with hypertensive chronic kidney disease in the setting of recommended antihypertensive therapy. Study Design, Setting, & Participants: On completion of the AASK Trial, a randomized, double-blind, 3 × 2 factorial trial, participants who had not yet begun dialysis treatment or undergone kidney transplantation were invited to enroll in a prospective Cohort Study. Cohort Study participants received recommended antihypertensive drug therapy, including high rates of angiotensin-converting enzyme-inhibitor (73%) and angiotensin receptor blocker (10%) use with a blood pressure goal of less than 130/80 mm Hg. Predictor, Outcomes, & Measurements: Baseline clinical and demographic characteristics are described separately at the baseline of the AASK Trial and Cohort Study. Results: Of 1,094 persons enrolled in the AASK Trial (June 1995 to September 2001; mean age, 55 years; 61% men), 691 enrolled in the AASK Cohort Study (April 2002 to present), 299 died or reached dialysis therapy or transplantation, and 104 declined to participate in the AASK Cohort Study. Mean baseline systolic/diastolic blood pressures were 150/96 mm Hg in the Trial and 136/81 mm Hg in the Cohort Study. Cohort Study participants had greater serum creatinine levels at the start of the Cohort Study (2.3 versus 1.8 mg/dL [203 versus 159 μmol/L]), corresponding to an estimated glomerular filtration rate of 43.8 versus 50.3 mL/min/1.73 m2 (0.73 versus 0.84 mL/s/1.73 m2), than Trial participants and greater urine protein-creatinine ratios (0.38 versus 0.19 mg/mg, respectively). Individuals who were eligible, but declined to participate in the Cohort Study, had greater systolic blood pressure, but similar kidney function. Limitations: Some parameters, such as iothalamate glomerular filtration rate, urinary albumin level, echocardiogram, and ambulatory blood pressure, were not performed in both the Trial and the Cohort Study, limiting the ability to evaluate changes in these parameters over time. Conclusion: Despite well-controlled blood pressure in the AASK Trial, Cohort Study participants still had evidence of progressive chronic kidney disease. Thus, the AASK Cohort Study is well positioned to address its primary objective.

AB - Background: African Americans are at increased risk of kidney failure caused by hypertension. The primary objective of the African American Study of Kidney Disease and Hypertension (AASK) Cohort Study is to identify risk factors for progressive kidney disease in African Americans with hypertensive chronic kidney disease in the setting of recommended antihypertensive therapy. Study Design, Setting, & Participants: On completion of the AASK Trial, a randomized, double-blind, 3 × 2 factorial trial, participants who had not yet begun dialysis treatment or undergone kidney transplantation were invited to enroll in a prospective Cohort Study. Cohort Study participants received recommended antihypertensive drug therapy, including high rates of angiotensin-converting enzyme-inhibitor (73%) and angiotensin receptor blocker (10%) use with a blood pressure goal of less than 130/80 mm Hg. Predictor, Outcomes, & Measurements: Baseline clinical and demographic characteristics are described separately at the baseline of the AASK Trial and Cohort Study. Results: Of 1,094 persons enrolled in the AASK Trial (June 1995 to September 2001; mean age, 55 years; 61% men), 691 enrolled in the AASK Cohort Study (April 2002 to present), 299 died or reached dialysis therapy or transplantation, and 104 declined to participate in the AASK Cohort Study. Mean baseline systolic/diastolic blood pressures were 150/96 mm Hg in the Trial and 136/81 mm Hg in the Cohort Study. Cohort Study participants had greater serum creatinine levels at the start of the Cohort Study (2.3 versus 1.8 mg/dL [203 versus 159 μmol/L]), corresponding to an estimated glomerular filtration rate of 43.8 versus 50.3 mL/min/1.73 m2 (0.73 versus 0.84 mL/s/1.73 m2), than Trial participants and greater urine protein-creatinine ratios (0.38 versus 0.19 mg/mg, respectively). Individuals who were eligible, but declined to participate in the Cohort Study, had greater systolic blood pressure, but similar kidney function. Limitations: Some parameters, such as iothalamate glomerular filtration rate, urinary albumin level, echocardiogram, and ambulatory blood pressure, were not performed in both the Trial and the Cohort Study, limiting the ability to evaluate changes in these parameters over time. Conclusion: Despite well-controlled blood pressure in the AASK Trial, Cohort Study participants still had evidence of progressive chronic kidney disease. Thus, the AASK Cohort Study is well positioned to address its primary objective.

KW - African Americans

KW - baseline

KW - hypertension

KW - kidney disease

UR - http://www.scopus.com/inward/record.url?scp=34250759711&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=34250759711&partnerID=8YFLogxK

U2 - 10.1053/j.ajkd.2007.03.004

DO - 10.1053/j.ajkd.2007.03.004

M3 - Article

C2 - 17591527

AN - SCOPUS:34250759711

VL - 50

JO - American Journal of Kidney Diseases

JF - American Journal of Kidney Diseases

SN - 0272-6386

IS - 1

ER -