Conclusion:
The results of the present study indicated that coagulation disorders are more prevalent in patients with severe forms of COVID-19. It was also found that serum D-dimer level is positively associated with mortality. Although coagulation disorders in COVID-19 patients are still being investigated, the evidence thus far suggests that thrombotic coagulation disorder is quite prevalent in severe cases of COVID-19. The results also indicated that D-dimer has higher sensitivity in comparison with other coagulation markers and is of greater value in severity. Compared to the high prevalence of thrombotic events, bleeding is not that common; therefore, standard anticoagulant therapy is highly recommended.