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Evaluation of Aging, Autonomic Nervous System Activity and Cardiovascular Events (PROOF)

This study is ongoing, but not recruiting participants.
Ministry of Health, France
Information provided by (Responsible Party):
Centre Hospitalier Universitaire de Saint Etienne Identifier:
First received: September 24, 2008
Last updated: August 10, 2016
Last verified: August 2016

The regulatory effects of the autonomic nervous system (ANS) concern almost all organs which permanently feed information back to this global biological vigilance system controlling allostasis. Heart rate fluctuations are highly dependent on ANS control, making the heart one of the best indicators of ANS activity.

Low ANS activity level is associated with severe cardiac and cerebral events, as well as to death from any cause in the general population.

This PROOF study was hence designed to evaluate ANS activity levels among a healthy retired population, but should these levels decline overtime, to use this as a predictor of cardiovascular and cerebrovascular events, taking into account established cardiovascular risk factors.


Study Type: Observational
Study Design: Observational Model: Cohort
Time Perspective: Prospective
Official Title: Evaluation of Aging, Autonomic Nervous System Activity and Cardiovascular Events on a Prospective Cohort of Subjects Aged 65 Years

Further study details as provided by Centre Hospitalier Universitaire de Saint Etienne:

Primary Outcome Measures:
  • Composite criterion : fatal and non-fatal cardiovascular or cerebrovascular events [ Time Frame: During all the study ]

Secondary Outcome Measures:
  • Presence and severity of clinically silent stroke revealed through brain MRI [ Time Frame: Years 1, 3 and 5 ]
  • Neuropsychological performance [ Time Frame: Years 1, 3 and 5 ]
  • ANS activity measured by heart rate variability + spontaneous baroreflex + blood pressure variability [ Time Frame: Years 1, 3 and 5 ]
  • Biological data : fasting blood glucose, total and HDL cholesterol, triglycerides and CRP [ Time Frame: Years 1, 3 and 5 ]

Biospecimen Retention:   Samples With DNA
Serum, DNA

Enrollment: 1011
Study Start Date: January 2001
Estimated Study Completion Date: December 2021
Estimated Primary Completion Date: December 2021 (Final data collection date for primary outcome measure)
PROOF cohort
Healthy inhabitants of the city of Saint-Etienne, France, and aged 65 years at the inclusion date.

Detailed Description:
The main goal of this PROOF study is to evaluate, on a selected prospective cohort of subjects aged 65 years upon study entry, the prognostic values of ANS activity levels measured at preset times, and more specifically, of its decline over the follow-up period, for fatal and non-fatal cardiovascular and cerebrovascular events.

Ages Eligible for Study:   65 Years to 65 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes
Sampling Method:   Non-Probability Sample
Study Population
Subjects were recruited amongst the inhabitants of the city of Saint-Etienne, France, and were eligible if aged 65 at the inclusion date.

Inclusion Criteria:

  • 65 years old
  • informed consent signed

Exclusion Criteria:

  • prior myocardiac infarction
  • prior stroke
  • hearth failure
  • atrial fibrillation
  • insulin-treated diabetes mellitus
  • cardiac pacemaker
  • disease limiting life expectancy to < 5 years
  • contraindication to brain MRI
  • living in an institution
  Contacts and Locations
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Please refer to this study by its identifier: NCT00759304

Centre Hospitalier de Saint-Etienne
Saint-Etienne, France, 42055
Sponsors and Collaborators
Centre Hospitalier Universitaire de Saint Etienne
Ministry of Health, France
Principal Investigator: Jean-Claude BARTHELEMY, MD PhD CHU de Saint-Etienne
  More Information


Publications automatically indexed to this study by Identifier (NCT Number):

Responsible Party: Centre Hospitalier Universitaire de Saint Etienne Identifier: NCT00759304     History of Changes
Other Study ID Numbers: 9808112
Study First Received: September 24, 2008
Last Updated: August 10, 2016
Individual Participant Data  
Plan to Share IPD: No

Keywords provided by Centre Hospitalier Universitaire de Saint Etienne:
cardiovascular risk factors
Autonomic nervous system
Myocardiac infarction
Neuropsychological evaluation
Prospective cohort processed this record on May 23, 2017