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J Am Heart Assoc . Renin-Angiotensin System Blockers and Adverse Outcomes of Influenza and Pneumonia: A Danish Cohort Study

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  • J Am Heart Assoc . Renin-Angiotensin System Blockers and Adverse Outcomes of Influenza and Pneumonia: A Danish Cohort Study


    J Am Heart Assoc


    . 2020 Oct 1;e017297.
    doi: 10.1161/JAHA.120.017297. Online ahead of print.
    Renin-Angiotensin System Blockers and Adverse Outcomes of Influenza and Pneumonia: A Danish Cohort Study


    Christian Fynbo Christiansen 1 , Uffe Heide-J?rgensen 1 , Thomas B?jer Rasmussen 1 , Jacob Bodilsen 2 , Ole Schmeltz S?gaard 3 , Michael Maeng 4 , Simon Tilma Vistisen 5 6 , Morten Schmidt 1 4 7 , Anton Potteg?rd 8 , Lars Christian Lund 8 , Mette Reilev 8 , Jesper Hallas 8 , Nanna Borup Johansen 9 , Nikolai Constantin Brun 9 , Henrik Toft S?rensen 1 10 , Reimar Wernich Thomsen 1



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    Abstract

    Background Angiotensin-converting enzyme inhibitors (ACE-Is) and angiotensin receptor blockers (ARBs) may worsen the prognosis of coronavirus disease 2019, but any association could be confounded by the cardiometabolic conditions indicating ACE-I/ARB use. We therefore examined the impact of ACE-Is/ARBs on respiratory tract infection outcomes. Methods and Results This cohort study included all adult patients hospitalized with influenza or pneumonia from 2005 to 2018 in Denmark using population-based medical databases. Thirty-day mortality and risk of admission to the intensive care unit in ACE-Is/ARBs users was compared with nonusers and with users of calcium channel blockers. We used propensity scores to handle confounding and computed propensity score-weighted risks, risk differences (RDs), and risk ratios (RRs). Of 568 019 patients hospitalized with influenza or pneumonia, 100 278 were ACE-I/ARB users and 37 961 were users of calcium channel blockers. In propensity score-weighted analyses, ACE-I/ARB users had marginally lower 30-day mortality than users of calcium channel blockers (13.9% versus 14.5%; RD, -0.6%; 95% CI, -1.0 to -0.1; RR, 0.96; 95% CI, 0.93-0.99), and a lower risk of admission to the intensive care unit (8.0% versus 9.6%; RD, -1.6%; 95% CI, -2.0 to -1.2; RR, 0.83; 95% CI, 0.80-0.87). Compared with nonusers, current ACE-I/ARB users had lower mortality (RD, -2.4%; 95% CI, -2.8 to -2.0; RR, 0.85; 95% CI, 0.83-0.87), but similar risk of admission to the intensive care unit (RD, 0.4%; 95% CI, 0.0-0.7; RR, 1.04; 95% CI, 1.00-1.09). Conclusions Among patients with influenza or pneumonia, ACE-I/ARB users had no increased risk of admission to the intensive care unit and slightly reduced mortality after controlling for confounding.

    Keywords: angiotensin receptor blockers; angiotensin‐converting enzyme inhibitor; cohort study; infectious disease; intensive care unit.

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