Publication date: Available online 18 December 2018
Source: Journal of Allergy and Clinical Immunology
Author(s): Anna Ascott, Amy Mulick, Ashley Yu, David Prieto-Merino, Morten Schmidt, Katrina Abuabara, Liam Smeeth, Amanda Roberts, Sinéad M. Langan
Abstract
Background
Atopic eczema is a common inflammatory skin disease. Various inflammatory conditions have been linked to cardiovascular disease, a major cause of global mortality and morbidity.
Objective
To systematically review and meta-analyse population-based studies assessing associations between atopic eczema and specific cardiovascular outcomes.
Methods
MEDLINE, EMBASE, and Global Health were searched from inception to December 2017. We obtained pooled estimates using random effects meta-analyses. We used multivariate Bayesian meta-regression model to estimate the slope of effect of increasing atopic eczema severity on cardiovascular outcomes.
Results
19 relevant studies were included. The effects of atopic eczema reported in cross-sectional studies were heterogeneous, with no evidence for pooled associations with angina, myocardial infarction, heart failure, or stroke. In cohort studies, atopic eczema was associated with increased risk of myocardial infarction (n=4), (relative risk 1.12, 95% confidence interval (CI) 1.00 to 1.25); stroke (n=4), (1.10, 1.03 to 1.17;); ischaemic stroke (n=4), (1.17, 1.14 to 1.20; angina (n=2), (1.18, 95% CI 1.13 to 1.24); and heart failure (n=2), (1.26, 95% CI 1.05 to 1.51). Prediction intervals were wide for myocardial infarction and stroke.
The risk of developing cardiovascular outcomes appeared to increase with increasing severity (mean relative risk increase between severity categories 1.15, 95% credibility interval 1.09 to 1.21, uncertainty interval 1.04 to 1.28).
Conclusion
Significant associations with cardiovascular outcomes were more common in cohort studies but with considerable between-study heterogeneity. Increasing atopic eczema severity was associated with increased risk of cardiovascular outcomes. Improved awareness amongst stakeholders regarding this small significant association is warranted.
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