The study of intermediate-term survival of the patients with cerebral venous sinus thrombosis

ABSTRACT

@#Objective: This study aimed to investigate the intermediate survival of patients with cerebral venous sinus thrombosis (CVST). Methods: This is a retrospective study recruiting patients with a definite diagnosis of CVST who were referred to teaching hospitals of “Shiraz University of Medical Sciences” from 2007 to 2017. Follow-up phone calls were conducted in March 2019 till June 2019. All-cause mortality, mortality due to CVST, and CVST recurrence were investigated. Results: Of the total of 301 patients, 213 (70.8%) were female. Patients’ age ranged from 1 to 95 year with a mean of 39.9 year. Intermediate follow-up (mean 46.9, 95%CI 43.6-50.2 months) was done. Intermediate term mortality was 12.3%, mostly from CVST, and largely occurred within the first month. Age was a significant risk factor for survival (HR=1.056, 95%CI1.037-1.075). The difference was not statistically significant in males in comparison to females (HR=1.3, 95%CI0.67-2.60, P=0.41). Patients with recurrent CVST hada higher risk of mortality (HR=9.14, 95%CI4.70-17.89, P<0.001). There was statistically higher risk of mortality in patients with deep vein thrombosis (DVT) (HR=8.97, 95%CI 4.32-18.61, P<0.001). Although the risk of death for patients using oral contraceptives (OCPs) was 16% higher, this was not statistically significant (HR=1.16, 95%CI 0.52-2.55, P= 0.21). Conclusions: Intermediate-term mortality was 12.3%, and associated with older age, recurrent CVST and DVT. The reasons for these findings need further investigation.