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Trial registered on ANZCTR
Registration number
ACTRN12618000005257
Ethics application status
Approved
Date submitted
27/11/2017
Date registered
10/01/2018
Date last updated
10/01/2018
Type of registration
Retrospectively registered
Titles & IDs
Public title
Arterial Stiffness in women, during the menopausal transition and beyond, as a predictor of cardiovascular disease: a twelve-year followup to assess the contribution of hormonal factors in a representative sample of urban Australian women
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Scientific title
A twelve-year followup study to assess arterial stiffness as a predictor of cardiovascular disease in a representative sample of urban Australian women
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Secondary ID [1]
293458
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None
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Universal Trial Number (UTN)
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Trial acronym
LAW study (Longitudinal Assessment of Ageing in Women) - the arterial compliance project is a sub-study of the LAW study
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Linked study record
O ’ Neill SM, Liu J, O ’ Rourke MF, Khoo SK. The menopausal transition does not appear
to accelerate age-related increases in arterial stiffness. CLIMACTERIC 2012;15:1–8
The cited paper reported on the cr0ss-sectional analysis of the arterial stiffness project of the LAW study. The conclusion was that the data should be confirmed with the results of longitudinal data.
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Health condition
Health condition(s) or problem(s) studied:
Heart disease in women
305638
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Menopause
305739
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Condition category
Condition code
Cardiovascular
304863
304863
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0
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Diseases of the vasculature and circulation including the lymphatic system
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Reproductive Health and Childbirth
305087
305087
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0
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Menstruation and menopause
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Intervention/exposure
Study type
Observational
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Patient registry
False
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Target follow-up duration
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Target follow-up type
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Description of intervention(s) / exposure
The proposed study will replicate a previous cross-sectional study of the relationship between
menopause status and arterial stiffness in a subset of a multidisciplinary assessment of the effects of ageing in women. The results of the cross-sectional study (see earlier citation) demonstrated that ageing was the factor most strongly associated with increasing aortic stiffness. Menopause, per se, did not appear to alter gradual age-dependent changes in arterial stiffness. However, this study was limited by its five-year time span, and the numbers of women who were approaching the menopausal transition at the time of the study
This replication will involve re-testing the same sample of women twelve years after their initial assessment when all pre-menopausal women in the original sample will almost certainly have entered or passed through the menopausal transition.
The retest procedure should take approximately one hour to complete and was conducted in the Betty Byrne Henderson Women's Health Research Centre, Royal Brisbane Women's Hospital Herston, QLD.
Brachial systolic blood pressure (SBP) and diastolic blood pressure (DBP) were measured
in the sitting position after approximately 5 minutes of rest using a mercury sphygmomanometer. BP measurement was recorded as an average of three readings at two-minute intervals.
Arterial stiffness (pulse wave velocity and pulse wave analysis) was measured non-invasively (using SphygmoCor® technology). All assessments were undertaken by the same specially trained registered nurses using the same equipment. SBP and DBP were entered into the SphygmoCor software to allow for calibration of the radial pressure waveform. Height, weight, body mass index (BMI), details of medical history, family history of diabetes and cardiovascular disease (CVD), smoking history, menopause status, use of cardiovascular medication and hormone therapy were also entered into the SphygmoCor database.
All participants were studied in the supine position. Radial artery waveforms were
recorded in all subjects with a high-fidelity tonometer (Millar Instruments, Houston, Texas) from the right wrist. Pulse wave analysis (SphygmoCor version CvMSV9. AtCor Medical Pty
Ltd., Sydney, Australia) was used to generate a corresponding central waveform with a
generalized transfer function, which has been validated against invasive recordings of the
aortic pressure wave. Four or five studies of pulse wave analysis (PWA) were collected from each subject, and the mean values used in the subsequent analysis. Only studies with a quality index of over 90% were accepted. With the SphygmoCor software, Augmentation Pressure (AP) is calculated as the difference between the second and first systolic peaks, and Augmentation Index calculated as AP expressed as a percentage of the pulse pressure (PP).
The aortic pulse wave velocity (PWV) was measured with the same machine, at the femoral (site A) and carotid (site B) arteries with simultaneous electrocardiograph (ECG) using the Lead II ECG configuration. PWV distance was measured (in millimeters) superficially by subtracting the distance between the carotid site and the suprasternal notch from the distance between the suprasternal notch (via the umbilicus) and the femoral site.
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Intervention code [1]
299698
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Not applicable
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Comparator / control treatment
No control group
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Control group
Uncontrolled
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Outcomes
Primary outcome [1]
304059
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The aim of this composite primary outcome study was to determine the relationship between menopause status and parameters of arterial stiffness including: pulse wave velocity (PWV), augmentation index (AI), and augmentation index @75 (AIx@75), in a cohort of urban Australian women followed up for 12 years.
PWV is the 'gold standard' for assessing arterial stiffness and was measured non-invasively using SphygmoCor technology. AIx and AIx@75 may also be used to support PWV and are measured simultaneously. (See description under step #3)
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Assessment method [1]
304059
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Timepoint [1]
304059
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Each subject was retested for arterial stiffness 12 years after the original test, using non-invasive methodology (SphygmoCor, Atcor Medical). The retesting occurred within an 18-month period, beginning in July 2013.
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Secondary outcome [1]
340815
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The number of reported cardiac events including cardiac deaths in the cohort between baseline and 12-year follow up. Details of cardiac events were collected at the time of retest and included: history of myocardial infarction, angina, transient ischaemia attack, coronary artery bypass procedure, stent procedure, stroke, venous thromboembolism, cardiac arrhythmia.
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Assessment method [1]
340815
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Timepoint [1]
340815
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12 year follow-up
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Eligibility
Key inclusion criteria
Women who had participated in the arterial compliance project of the original LAW study during 2001-2002 were invited to participate in the retest project.
The LAW study (an age stratified prospective multidisciplinary study conducted at the RBWH)- a total of 511 urban women were randomly selected from the Brisbane North electoral roll within four age cohorts: 40–49, 50–59,60–69 and 70–79 years.
Eligible women were restricted; to the geographic area of North Brisbane, defined as all suburbs north of the Brisbane river; women who were ambulatory or able to be transported; available and willing to undergo the comprehensive examinations; and willing to provide informed consent.
It was estimated that there would be 350 women available of the original cohort of 468 who
participated in the cross-sectional arterial compliance project (2001-2002) of the LAW study,
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Minimum age
40
Years
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Maximum age
80
Years
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Sex
Females
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Can healthy volunteers participate?
Yes
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Key exclusion criteria
Women who were not ambulatory, or due to illness and unable to attend the research unit, as well as those with conditions such as atrial fibrillation which would have affected the testing itself.
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Study design
Purpose
Natural history
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Duration
Longitudinal
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Selection
Defined population
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Timing
Prospective
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Statistical methods / analysis
A 12- year longitudinal design will be used to capture the menopause effect with age as an
explanatory variable. The Statistical Package for the Social Sciences software (SPSS, Chicago,
IL, Version 21.0) and SAS program (version 9.3) will be used for multiple regression analysis to
investigate the association and correlation between menopausal transition and the rate of arterial stiffening (PWV, AIX, AIx@75).
There were 468 patients in the cross- sectional study. Of the original cohort, it is expected that
350 subjects will be followed-up at the 12-year retest. A sample size of 350 women will achieve a statistical power of 90% in detecting a statistically significant difference (a = 0.05).
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Recruitment
Recruitment status
Completed
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Date of first participant enrolment
Anticipated
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Actual
10/07/2013
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Date of last participant enrolment
Anticipated
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Actual
30/04/2014
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Date of last data collection
Anticipated
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Actual
18/12/2014
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Sample size
Target
350
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Accrual to date
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Final
324
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Recruitment in Australia
Recruitment state(s)
QLD
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Recruitment hospital [1]
9446
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Royal Brisbane & Womens Hospital - Herston
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Recruitment postcode(s) [1]
18164
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4029 - Royal Brisbane Hospital
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Funding & Sponsors
Funding source category [1]
298082
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Other
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Name [1]
298082
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Arterial Compliance Trust Account
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Address [1]
298082
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PO Box 3275, Manuka, ACT 2603
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Country [1]
298082
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Australia
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Primary sponsor type
Individual
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Name
Clinical Associate Professor Sheila O'Neill
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Address
Betty Byrne Henderson Women's Health Research Centre, c/o PO Box 3275, Manuka, ACT 2603
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Country
Australia
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Secondary sponsor category [1]
297161
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None
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Name [1]
297161
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Address [1]
297161
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Country [1]
297161
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Ethics approval
Ethics application status
Approved
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Ethics committee name [1]
299104
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Human Research Ethics Committee, Royal Brisbane and Women's Hospital Metro North Hospital and Health Service
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Ethics committee address [1]
299104
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Royal Brisbane Women's Hospital, Butterfield Street, Herston, QLD 4029.
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Ethics committee country [1]
299104
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Australia
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Date submitted for ethics approval [1]
299104
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22/04/2013
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Approval date [1]
299104
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06/06/2013
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Ethics approval number [1]
299104
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HREC/13/QRBW/136
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Summary
Brief summary
The proposed study will help resolve a long-running controversy in women’s health. For the first time in Australia, it will provide longitudinal (12-year) data abut the relationship between the rate of increase in arterial stiffness in women (a known risk factor for cardiovascular disease) and the withdrawal of oestrogen through the menopausal transition
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Trial website
Not applicable
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Trial related presentations / publications
None
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Public notes
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Contacts
Principal investigator
Name
79302
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A/Prof Sheila O'Neill
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Address
79302
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Betty Byrne Henderson Women's Health Research Centre, Royal Brisbane Women's Hospital, Herston Qld 4006
Postal address: PO Box 3275 Manuka, ACT 2603
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Country
79302
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Australia
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Phone
79302
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+61 2 6193 3792
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Fax
79302
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Email
79302
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[email protected]
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Contact person for public queries
Name
79303
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A/Prof Sheila O'Neill
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Address
79303
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Betty Byrne Henderson Women's Health Research Centre, c/o PO Box 3275, Manuka, ACT 2603
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Country
79303
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Australia
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Phone
79303
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+61 2 6193 3792
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Fax
79303
0
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Email
79303
0
[email protected]
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Contact person for scientific queries
Name
79304
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A/Prof Sheila O'Neill
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Address
79304
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Betty Byrne Henderson Women's Health Research Centre, c/o PO Box 3275, Manuka, ACT 2603
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Country
79304
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Australia
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Phone
79304
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61 2 6193 3792
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Fax
79304
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Email
79304
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[email protected]
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No information has been provided regarding IPD availability
What supporting documents are/will be available?
No Supporting Document Provided
Results publications and other study-related documents
Documents added manually
No documents have been uploaded by study researchers.
Documents added automatically
Source
Title
Year of Publication
DOI
Embase
Menopause and accelerated aortic stiffness.
2024
https://dx.doi.org/10.1016/j.maturitas.2023.107900
N.B. These documents automatically identified may not have been verified by the study sponsor.
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