Blood Pressure Tracking--Childhood to Young Adulthood | NCT00005421

Studies
Blood Pressure Tracking--Childhood to Young Adulthood

NCT00005421

Sponsor

National Heart, Lung, and Blood Institute (NHLBI)

Status

Completed

Last Update Posted

Mar 16, 2016Estimated

Enrollment

Not provided

Phase

Not provided

Conditions

Cardiovascular Diseases
Heart Diseases
Hypertension

Interventions

Not provided

Countries

Not provided

Protocol Section

Identification Module Status Module Sponsor/Collaborators Module Oversight Module Description Module Conditions Module Design Module Arms/Interventions Module Outcomes Module Eligibility Module Contacts/Locations Module References Module IPD Sharing Statement Module

Results Section

Participant Flow Module Baseline Characteristics Module Outcome Measures Module Adverse Events Module More Info Module

Annotation Section

Annotation Module

Document Section

Large Document Module

Derived Section

Miscellaneous Info Module Condition Browse Module Intervention Browse Module

Protocol Section

Identification Module

NCT ID

Results Section

No data available

No data is available for this block.

Annotation Section

No data available

No data is available for this block.

Document Section

No data available

No data is available for this block.

Derived Section

Miscellaneous Info Module

Version Holder

ID	Type	Description	Link
R03HL048289	U.S. NIH Grant/Contract		View source

Status Module

Record Verification Date

Mar 2005

Overall Recruitment Status or Expanded Access Status

Completed

Last Known Status

Not provided

Delayed Posting

Not provided

Why Stopped

Not provided

Expanded Access Info

Start Date

Sep 1992

Primary Completion Date

Not provided

Completion Date

Mar 1995Actual

First Submitted Date

May 25, 2000

First Submission Date that Met QC Criteria

May 25, 2000

First Posted Date

May 26, 2000Estimated

Results Waived

Not provided

Results First Submitted Date

Not provided

Results First Submitted that Met QC Criteria

Not provided

Results First Posted Date

Not provided

Certification/Extension (aka Delayed Results) First Submitted Date

Not provided

Certification/Extension First Submitted that Passed QC Review

Not provided

Certification/Extension First Posted Date

Not provided

Last Update Submitted Date

Mar 15, 2016

Last Update Posted Date

Mar 16, 2016Estimated

Description Module

Brief Summary

To extend analyses of blood pressure (BP) tracking to a period that spanned childhood and young adulthood. Data were used from the same cohort of 339 children who had been followed for nine to twelve years in a previous study.

Detailed Description

BACKGROUND:

Blood pressure measurements in childhood and young adulthood are less predictive of future levels than those taken in middle age. In part, this may be due to the fact that within-person variability appears to make up a larger proportion of total variability in childhood than adulthood. Previous work on an NHLBI supported grant indicated that repeated blood pressure measurements and visits led to higher childhood tracking correlations over a period of three years.

DESIGN NARRATIVE:

Follow-up data were used as well as multiple visits which reduced the large within-person variability of blood pressure measurements and improved the tracking correlations. In addition, 'true' or 'corrected' tracking correlations were provided by eliminating the effects of random measurement error. The effects were examined of time-varying covariates on both the observed and true tracking correlations. Besides computing tracking correlations, predictive values were computed for young adult blood pressure given childhood levels. This was the probability that a young adult's true blood pressure was above a specific cutpoint conditional on childhood blood pressure. These values were validated using data from the Fels Longitudinal Study, which included serial blood pressure measurements over the age range in the study. The prediction models were also derived including terms for covariates such as age, sex, height and weight. From these models nomograms were constructed which were useful to physicians for prognostic purposes. Thus, because of the unique multiple-visit approach used in these data, the effect of random measurement error was eliminated. These methodologic improvements strengthened the usefulness of blood pressure screening in childhood to detect those at high risk of developing hypertension.

The study completion date listed in this record was obtained from the "End Date" entered in the Protocol Registration and Results System (PRS) record.

Design Module

Study Type

Observational

Number of References to an Expanded Access Study

Not provided

Expanded Access Types

Not provided

Patient Registry

Not provided

Target Follow-Up Duration

Not provided

Phases

Not provided

Interventional Study Design

No data available

No data is available for this block.

Biospecimen

No data available

No data is available for this block.

Enrollment

Not provided

Eligibility Module

Eligibility Criteria

No eligibility criteria

Accepts Healthy Volunteers

Sex

Male

Sex/Gender Based

Not provided

Sex/Gender Description

Not provided

Minimum Age

Not provided

Maximum Age

100 Years

Standard Ages

ChildAdultOlder Adult

Study Population

Not provided

Sampling Method

Not provided

Name	Affiliation	Role
Nancy Cook	Brigham and Women's Hospital

References Module

Citations

PubMed Identifier	Type	Citation	Retractions
9180649	Background	Cook NR, Gillman MW, Rosner BA, Taylor JO, Hennekens CH. Prediction of young adult blood pressure from childhood blood pressure, height, and weight. J Clin Epidemiol. 1997 May;50(5):571-9. doi: 10.1016/s0895-4356(97)00046-2.
8896136	Background	Cook NR. Estimating predictive values for blood pressure measurements from multivariate regression models with covariates. Stat Med. 1996 Oct 15;15(19):2013-28. doi: 10.1002/(SICI)1097-0258(19961015)15:193.0.CO;2-Y.

ID	Term
D002318	Cardiovascular Diseases
D006331	Heart Diseases
D006973	Hypertension