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Psychosom Med. 2020 Feb 13. doi: 10.1097/PSY.0000000000000790. [Epub ahead of print]

Anxiety and Depression Symptom Comorbidity and the Risk of Heart Disease: A Prospective Community-Based Cohort Study.

Author information

1
School of Psychology, University College Dublin, Ireland.
2
Department of Psychiatry, McGill University, Canada.
3
Department of Psychology, Carleton University, Canada.
4
Douglas Mental Health University Institute, Canada.
5
Department of Epidemiology and Biostatistics, McGill University, Canada.

Abstract

OBJECTIVE:

The goal of this study was to examine the independent and joint associations between anxiety and depression symptoms with the risk of heart disease.

METHODS:

30,635 participants from the CARTaGENE community cohort study in Quebec, without heart diseases at baseline, were included in the study. Baseline anxiety and depression symptoms were assessed via validated questionnaires. Survey data were linked with diagnostic codes from a public insurance database to examine incident heart disease during a 7-year follow-up period. Cox regression analyses were conducted comparing groups with high anxiety only, high depression only, comorbid anxiety and depression, and no/low symptoms of both on the risk of heart disease. Additional analyses examined anxiety and depression using continuous questionnaire symptom scores, data-driven comorbidity groups, and using diagnostic codes. Covariates included sociodemographic characteristics, health behaviours, diabetes, and hypertension.

RESULTS:

In the main analyses, we found that whereas depression without anxiety symptoms was associated with an increased risk of heart disease (HR=1.35, 95% CI=1.04-1.74), there was no significant association for anxiety without depression symptoms (HR=1.00, 95% CI=0.71-1.41). High anxiety assessed with diagnostic codes or by examining latent classes was, however, associated with a higher risk of heart disease.

CONCLUSIONS:

The association between anxiety and incident heart disease may be accounted for by comorbid depression, particularly when anxiety and depression symptoms are assessed using self-report questionnaires. Differing methods of assessment and analysis, and adjustment for comorbid depression, may explain differences in findings across different studies on anxiety and the risk of heart disease.

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