Platelet Count Rose While D-Dimer Levels Dropped as Deaths and Thrombosis Declined-An Observational Study on Anticoagulation Shift in COVID-19.
Thromb Haemost
; 121(12): 1610-1621, 2021 Dec.
Article
in English
| MEDLINE | ID: covidwho-1172583
ABSTRACT
BACKGROUND:
High levels of D-dimer and low platelet counts are associated with poor outcome in coronavirus disease 2019 (COVID-19). As anticoagulation appeared to improve survival, hospital-wide recommendations regarding higher doses of anticoagulation were implemented on April 9, 2020.OBJECTIVES:
To investigate if trends in D-dimer levels and platelet counts were associated with death, thrombosis, and the shift in anticoagulation.METHODS:
Retrospective cohort study of 429 patients with COVID-19 at Karolinska University Hospital. Information on D-dimer levels and platelet counts was obtained from laboratory databases and clinical data from medical records.RESULTS:
Thirty-day mortality and thrombosis rates were 19% and 18%, respectively. Pulmonary embolism was common, 65/83 (78%). Increased D-dimer levels in the first week in hospital were significantly associated with death and thrombosis (odds ratio [OR] 6.06; 95% confidence interval [CL] 2.10-17.5 and 3.11; 95% CI 1.20-8.10, respectively). If platelet count increased more than 35 × 109/L per day, the mortality and thrombotic risk decreased (OR 0.16; 95% CI 0.06-0.41, and OR 0.36; 95% CI 0.17-0.80). After implementation of updated hospital-wide recommendations, the daily mean significantly decreased regarding D-dimer levels while platelet counts rose; -1.93; 95% CI -1.00-2.87 mg/L FEU (fibrinogen-equivalent unit) and 65; 95% CI 54-76 ×109/L, and significant risk reductions for death and thrombosis were observed; OR 0.48; 95% CI 0.25-0.92 and 0.35; 95% CI 0.17-0.72.CONCLUSION:
In contrast to D-dimer levels, increase of platelet count over the first week in hospital was associated with improved survival and reduced thrombotic risk. The daily mean levels of D-dimer dropped while the platelet counts rose, coinciding with increased anticoagulation and a decline in thrombotic burden and mortality.
Full text:
Available
Collection:
International databases
Database:
MEDLINE
Main subject:
Thrombosis
/
Blood Platelets
/
Fibrin Fibrinogen Degradation Products
/
COVID-19 Drug Treatment
/
Anticoagulants
Type of study:
Cohort study
/
Diagnostic study
/
Observational study
/
Prognostic study
Limits:
Aged
/
Female
/
Humans
/
Male
/
Middle aged
Country/Region as subject:
Europa
Language:
English
Journal:
Thromb Haemost
Year:
2021
Document Type:
Article
Affiliation country:
A-1477-3829
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