The role of green tea intake in thromboprophylaxis of venous thromboembolism in patients with cancer

Green tea intake has been reported to improve the clinical outcomes of patients with cardiovascular diseases or cancer. It may have a certain role in the development of venous thromboembolism (VTE) among cancer patients. The current study aimed to address this issue, which has been understudied. We carried out a retrospective study to explore the role of green tea intake in cancer patients. Patients with and without green tea intake were enrolled in a 1:1 ratio by using propensity scoring matching. The primary and secondary outcomes were VTE development and mortality 1 year after cancer diagnosis, respectively. The cancer patients with green tea intake ( = 425) had less VTE development (10 [2.4%] vs. 23 [5.4%], = 0.021), VTE-related death (7 [1.6%] vs. 18 [4.2%], = 0.026), and fatal pulmonary embolism (PE) (3 [0.7%] vs. 12 [2.8%], = 0.019), compared with those without green tea intake ( = 425). No intake of green tea was correlated with an increase in VTE development (multivariate hazard ratio (HR) 1.758 [1.476-2.040],