http://cpr.sagepub.com/content/early/2014/01/31/2047487314520785.full
- Eric J Brunner1
- Martin J Shipley1
- Annie R Britton1
- Stephen A Stansfeld2
- Peter U Heuschmann3
- Anthony G Rudd4
- Charles DA Wolfe4,5
- Archana Singh-Manoux1,6
- Mika Kivimaki1
- 1University College London, London, UK
- 2Barts and the London School of Medicine and Dentistry, London, UK
- 3Institute of Clinical Epidemiology and Biometry; Comprehensive Heart Failure Center, University of Würzburg, Würzburg, Germany
- 4King’s College London and Guy’s & St. Thomas’ NHS Foundation Trust, London, UK
- 5National Institute for Health Research Biomedical Research Centre, King's College London and Guy's and St Thomas' NHS Foundation Trust, London, UK
- 6INSERM, Villejuif, France
- Eric Brunner, Department of Epidemiology and Public Health, University College London, London, WC1E 6BT, UK Email: e.brunner@ucl.ac.uk
Abstract
Background Systematic
reviews examining associations of depressive disorder with coronary
heart disease and stroke produce mixed results.
Failure to consider reverse causation and
dose–response patterns may have caused inconsistencies in evidence.
Design This
prospective cohort study on depressive disorder, coronary heart disease,
and stroke analysed reverse causation and dose–response
effects using four 5-year and three 10-year
observation cycles (total follow up 24 years) based on multiple repeat
measures
of exposure.
Methods Participants in the Whitehall II study (n
= 10,036, 31,395 person-observations, age at start 44.4 years) provided
up to six repeat measures of depressive symptoms
via the 30-item General Health Questionnaire
(GHQ-30) and one measure via Center for Epidemiologic Studies Depression
Scale
(CES-D). The cohort was followed up for major
coronary events (coronary death/nonfatal myocardial infarction) and
stroke (stroke
death/morbidity) through the national mortality
register Hospital Episode Statistics, ECG-screening, medical records,
and
self-report questionnaires.
Results GHQ-30
caseness predicted stroke over 0–5 years (age-, sex- and
ethnicity-adjusted HR 1.60, 95% CI 1.1–2.3) but not over
5–10 years (HR 0.94, 95% CI 0.6–1.4). Using the
last 5-year observation cycle, cumulative GHQ-30 caseness was associated
with
incident coronary heart disease in a
dose–response manner (1–2 times a case: HR 1.12, 95% CI 0.7–1.7; 3–4
times: HR 2.06,
95% CI 1.2–3.7), and CES-D caseness predicted
coronary heart disease (HR 1.81, 95% CI 1.1–3.1).
Conclusions There was
evidence of a dose–response effect of depressive symptoms on risk of
coronary heart disease. In contrast, prospective
associations of depressive symptoms with stroke
appeared to arise wholly or partly through reverse causation.
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