Depression and Anxiety in the Aetiology and Prognosis of Specific Cardiovascular Disease Syndromes: a CALIBER Study
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ClinicalTrials.gov Identifier: NCT01240798
Verified January 2010 by University College, London. Recruitment status was: Active, not recruiting
People report feeling sad and low (depression) or worried (anxiety) appear more likely to subsequently suffer a heart attack, or angina. However it is not known whether depression or anxiety actually causes heart disease. If these mental health problems and heart disease were cause and effect this has important implications for world health. Previous research on this topic has had several limitations. First, most studies have studied heart disease as if it were one thing. There is a need for studies which distinguish different types of heart disease (e.g. different types of heart attack, angina) which may be linked to mental health problems in different ways. Second, it is not clear whether symptoms of heart disease come before the depression or anxiety or the other way round? Much of the available research cannot look at this in detail because they rely on data from occasional snapshots of study populations rather than a continuous record. The investigators propose to use the linkage of the national registry of coronary events to general practice records in the GPRD, which will allow us to address these limitations. The investigators research will help us understand better whether mental health problems cause the onset of different types of coronary disease.
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Ages Eligible for Study:
18 Years and older (Adult, Senior)
Sexes Eligible for Study:
Accepts Healthy Volunteers:
The study population will include all adults (18+) in GPRD registered in up-to-standard practices with at least 1 year of up to standard follow up. Analyses will focus on the ~200 practices which have consented to linkage with HES and MINAP. Essentially we will define an aetiological cohort - whole population - free of any coronary syndrome at start of follow up. Patients within this cohort are followed for the aetiologic endpoint of a first specific coronary syndrome (see below). This aetiologic endpoint is the prognostic start-point; such patients will then be followed for subsequent specific coronary syndromes and death. We will focus analyses on patients with at least a year follow up data before and their endpoint. As in a conventional cohort study we will define according to exposure history.
Aged >18 years
Patient in a GPRD registered practice that has consented to the linkage process
Patients are free of any coronary syndrome at the start of follow-up
Less than 1 year of follow-up before their end-point