Evaluating the Relationship Between Stress, Ethnicity, and Blood Pressure
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|ClinicalTrials.gov Identifier: NCT00783497|
Recruitment Status : Completed
First Posted : October 31, 2008
Last Update Posted : December 17, 2015
|Condition or disease|
High blood pressure affects nearly one third of all people in the United States. It can be caused by many factors, including obesity, sodium intake, genetics, and stress. Ethnicity appears to also play a role, because African Americans are more susceptible to developing high blood pressure than other ethnic groups, with more than 40% of African Americans diagnosed with this condition. This study will examine the underlying reasons of why stress and African-American ethnicity contribute to high blood pressure risk and how ethnicity and stress interact with each other to increase this risk. Specifically, study researchers will examine how stress increases blood pressure, how people from different ethnic groups respond to stress differently, and how sleep plays a role in regulating blood pressure levels.
This study will enroll African Americans and Caucasians who have high blood pressure, as well as African Americans and Caucasians who have normal blood pressure. Potential participants will go through a screening process that involves a medical history review, questionnaires, and blood pressure monitoring. Eligible participants will then be admitted to the research clinic for a 2-night stay. Participants' nutrition history and body measurements will be obtained, and a catheter will be inserted into the arm so that blood can be easily collected during the clinic stay. During the night, participants' breathing habits and movements will be monitored while they sleep. During the day, blood pressure and heart activity will be monitored frequently, including when participants are asked to perform mildly stressful tasks, such as giving a short speech. Various medications that affect heart rate and blood pressure will be given at different times during the study, and researchers will monitor participants' reactions to each medication. Lastly, participants will also complete psychological questionnaires.
|Study Type :||Observational|
|Actual Enrollment :||203 participants|
|Observational Model:||Case Control|
|Official Title:||Stress, Blood Pressure, & Ethnicity|
|Study Start Date :||October 2005|
|Actual Primary Completion Date :||September 2010|
|Actual Study Completion Date :||December 2010|
To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00783497
|United States, California|
|University of California, San Diego|
|San Diego, California, United States, 92103|
|Principal Investigator:||Joel E. Dimsdale, MD||University of California, San Diego|