• Shuo Xu, Zi Ye, Jianyong Ma, and Taiwen Yuan.
• Department of Respiratory and Critical Care Medicine, the Ganzhou people's Hospital, Ganzhou of Jiangxi, Ganzhou, China.
• Eur. J. Clin. Invest. 2021 Jan 1; 51 (1): e13402.

BackgroundSeveral studies have suggested that chronic obstructive pulmonary disease (COPD) could be predictive of the prognosis in patients with heart failure (HF), but yield conflicting findings. Therefore, we conducted a meta-analysis to examine the impact of COPD on adverse outcomes in patients with HF.MethodsWe systematically searched the databases of PubMed, EMBASE, Google Scholar, Cochrane library from inception to August 2020 for the relevant studies. Adjusted risk ratios (RRs) and confidence intervals (CIs) were collected and then pooled by the Review Manager version 5.30 software with a random-effects model.ResultsA total of 18 studies (6 post hoc analyses of trials and 12 observational studies) were included in this meta-analysis. COPD was associated with an increased risk of all-cause mortality (hospitalized HF: RR 1.43, 95% CI: 1.20-1.70; chronic HF: RR 1.24, 95% CI: 1.16-1.33), but not cardiovascular mortality, in patients with hospitalized HF or chronic HF. In addition, COPD was associated with increased risks of all-cause hospitalization (RR 1.31, 95% CI: 1.21-1.42) and HF hospitalization (RR 1.31, 95% CI: 1.21-1.42) in the chronic HF patients.ConclusionsCOPD comorbidity could increase the risk of all-cause mortality of HF patients. Future research should confirm the findings on hospitalization because of the limited studies included for this outcome.© 2020 Stichting European Society for Clinical Investigation Journal Foundation. Published by John Wiley & Sons Ltd.

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