The investigators aim to determine the association of dietary intake on cardiovascular disease risk factors among children with overweight and obesity who are being evaluated for elevated blood pressure. The investigators will also investigate for predictors of vascular function and determine if predictors vary by level of sodium intake.
This research is being done to determine if the food or salt eaten can cause arteries to be stiffer and/or not work as well and if it can impact blood pressure over a 24-hour period of time. The investigators also want to determine if there are any risk factors or blood tests that can predict how stiff arteries are or how well arteries function. The investigators hope that the information from this study will help the investigators prevent blood pressure-related cardiovascular disease in children. This knowledge could help shape future guidelines on how to best prevent and treat high blood pressure and heart disease in children.
Study Type
OBSERVATIONAL
Enrollment
41
Participants will undergo the following cardiovascular assessments: 24-hour blood pressure monitoring, arterial stiffness measurements, endothelial function measurements.
Participants will wear an actigraph device for 7 days to measure participant's activity and sleep.
Participants will provide blood and urine samples for laboratory assessments.
Participants and parents will fill out questionnaires for emotional/behavioral assessments
Johns Hopkins School of Medicine Division of Pediatric Nephrology
Baltimore, Maryland, United States
Arterial stiffness as assessed by Pulse wave velocity
This will be determined from Pulse wave velocity (m/sec) done at the study visit
Time frame: 1 day
Arterial stiffness as assessed by Ambulatory Arterial Stiffness Index (AASI)
The Ambulatory Arterial Stiffness Index will be determined from data obtained from vascular measures and during 24-hour ambulatory blood pressure monitoring. Arterial stiffness increases as the regression slope approaches 0 and the AASI approaches 1.
Time frame: 1 day
Arterial stiffness as assessed by Augmentation Index
The Augmentation Index (measured as a percentage) will be determined from a vascular assessment and data obtained during 24-hour ambulatory blood pressure monitoring. A greater Augmentation Index represents a stiffer, less compliant vessel.
Time frame: 1 day
Endothelial function as assessed by Laser Doppler flow perfusion
The percent change in mean blood flow will be determined from Laser Doppler flow perfusion measurements obtained using a heating protocol.
Time frame: 1 day
Mean Blood pressure (mmHg)
Mean daytime systolic blood pressure in millimeters of mercury (mmHg) will be determined from 24-hour blood pressure monitoring.
Time frame: 1 day
Pediatric Adverse Childhood Events (ACEs) score
The Pediatric ACEs questionnaire contains 17 yes or no questions about stressful or traumatic life events. Greater exposure to adverse childhood experiences (ACEs) is associated with poorer physical and mental health. Some researchers have suggested that an ACEs score of greater than or equal to 3 or 4 significantly increases the risk for health problems, however, there is no widely accepted threshold for how many ACEs endorsed is clinically significant or more predictive of these problems.
Time frame: 1 day
Children's Emotion Management Scale (CEMS) score
The Children's Emotional management scale is a questionnaire that consists of 33 questions (3 point Likert scale) examining youth's ability to regulate appropriately their negative emotions (i.e. anger, sadness, and worry). Generally, poorer emotion regulation capabilities are associated with poorer health outcomes, with most research looking at CV outcomes in adults.
Time frame: 1 day
Behavior Assessment for Children (BASC) score
The Behavior Assessment for Children is a questionnaire that consists of 189 questions (True/False and 4 point Likert scale). It is a broad behavioral screening measure commonly used in child and adolescent psychology and psychiatric settings.It has three primary scales: internalizing (e.g., depression, anxiety), externalizing (e.g., aggression, hyperactivity), and total problems (combination of internalizing and externalizing plus attention problems and withdrawal subscales). Scores between 60-69 are considered "at risk" for clinical problems and scores of 70+ are considered clinically significant presence of those symptoms. Any scores that are not in this range are considered to be within normal limits and not indicative of difficulties.
Time frame: 1 day
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