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10.2807/1560-7917.ES.2021.26.9.2001202

http://scihub22266oqcxt.onion/10.2807/1560-7917.ES.2021.26.9.2001202
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suck abstract from ncbi


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pmid33663646      Euro+Surveill 2021 ; 26 (9): ä
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  • Incidence of COVID-19 in patients exposed to chloroquine and hydroxychloroquine: results from a population-based prospective cohort in Catalonia, Spain, 2020 #MMPMID33663646
  • Vivanco-Hidalgo RM; Molina I; Martinez E; Roman-Vinas R; Sanchez-Montalva A; Fibla J; Pontes C; Velasco Munoz C
  • Euro Surveill 2021[Mar]; 26 (9): ä PMID33663646show ga
  • BackgroundSeveral clinical trials have assessed the protective potential of chloroquine and hydroxychloroquine. Chronic exposure to such drugs might lower the risk of infection with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) or severe coronavirus disease (COVID-19).AimTo assess COVID-19 incidence and risk of hospitalisation in a cohort of patients chronically taking chloroquine/hydroxychloroquine.MethodsWe used linked health administration databases to follow a cohort of patients with chronic prescription of hydroxychloroquine/chloroquine and a control cohort matched by age, sex and primary care service area, between 1 January and 30 April 2020. COVID-19 cases were identified using International Classification of Diseases 10 codes.ResultsWe analysed a cohort of 6,746 patients (80% female) with active prescriptions for hydroxychloroquine/chloroquine, and 13,492 controls. During follow-up, there were 97 (1.4%) COVID-19 cases in the exposed cohort and 183 (1.4%) among controls. The incidence rate was very similar between the two groups (12.05 vs 11.35 cases/100,000 person-days). The exposed cohort was not at lower risk of infection compared with controls (hazard ratio (HR): 1.08; 95% confidence interval (CI): 0.83-1.44; p = 0.50). Forty cases (0.6%) were admitted to hospital in the exposed cohort and 50 (0.4%) in the control cohort, suggesting a higher hospitalisation rate in the former, though differences were not confirmed after adjustment (HR: 1.46; 95% CI: 0.91-2.34; p = 0.10).ConclusionsPatients chronically exposed to chloroquine/hydroxychloroquine did not differ in risk of COVID-19 nor hospitalisation, compared with controls. As controls were mainly female, findings might not be generalisable to a male population.
  • |*COVID-19 Drug Treatment[MESH]
  • |*COVID-19/epidemiology[MESH]
  • |Antiviral Agents/therapeutic use[MESH]
  • |Chloroquine/adverse effects[MESH]
  • |Female[MESH]
  • |Humans[MESH]
  • |Hydroxychloroquine/adverse effects[MESH]
  • |Incidence[MESH]
  • |Male[MESH]
  • |Prospective Studies[MESH]
  • |SARS-CoV-2[MESH]


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