Impact of High-Dose Prophylactic Anticoagulation in Critically Ill Patients With COVID-19 Pneumonia.

Journal Article (Letter)

BACKGROUND: Because of the high risk of thrombotic complications (TCs) during SARS-CoV-2 infection, several scientific societies have proposed to increase the dose of preventive anticoagulation, although arguments in favor of this strategy are inconsistent. RESEARCH QUESTION: What is the incidence of TC in critically ill patients with COVID-19 and what is the relationship between the dose of anticoagulant therapy and the incidence of TC? STUDY DESIGN AND METHODS: All consecutive patients referred to eight French ICUs for COVID-19 were included in this observational study. Clinical and laboratory data were collected from ICU admission to day 14, including anticoagulation status and thrombotic and hemorrhagic events. The effect of high-dose prophylactic anticoagulation (either at intermediate or equivalent to therapeutic dose), defined using a standardized protocol of classification, was assessed using a time-varying exposure model using inverse probability of treatment weight. RESULTS: Of 538 patients included, 104 patients experienced a total of 122 TCs with an incidence of 22.7% (95% CI, 19.2%-26.3%). Pulmonary embolism accounted for 52% of the recorded TCs. High-dose prophylactic anticoagulation was associated with a significant reduced risk of TC (hazard ratio, 0.81; 95% CI, 0.66-0.99) without increasing the risk of bleeding (HR, 1.11; 95% CI, 0.70-1.75). INTERPRETATION: High-dose prophylactic anticoagulation is associated with a reduction in thrombotic complications in critically ill patients with COVID-19 without an increased risk of hemorrhage. Randomized controlled trials comparing prophylaxis with higher doses of anticoagulants are needed to confirm these results. TRIAL REGISTRY:; No.: NCT04405869; URL:

Full Text

Duke Authors

Cited Authors

  • Tacquard, C; Mansour, A; Godon, A; Godet, J; Poissy, J; Garrigue, D; Kipnis, E; Rym Hamada, S; Mertes, PM; Steib, A; Ulliel-Roche, M; Bouhemad, B; Nguyen, M; Reizine, F; Gouin-Thibault, I; Besse, MC; Collercandy, N; Mankikian, S; Levy, JH; Gruel, Y; Albaladejo, P; Susen, S; Godier, A; French Working Group on Perioperative Hemostasis,

Published Date

  • June 2021

Published In

Volume / Issue

  • 159 / 6

Start / End Page

  • 2417 - 2427

PubMed ID

  • 33465342

Pubmed Central ID

  • PMC7832130

Electronic International Standard Serial Number (EISSN)

  • 1931-3543

Digital Object Identifier (DOI)

  • 10.1016/j.chest.2021.01.017


  • eng

Conference Location

  • United States