Diabetes mellitus is associated with a higher relative risk for venous thromboembolism in females than in males

Aims: The risk for developing venous thromboembolism (VTE) is about equal in both sexes. Research suggests diabetes mellitus (DM) is a risk factor for pulmonary embolism and deep vein thrombosis, both forms of VTE. We aimed at investigating the sex-specific impact of DM on VTE risk. Materials and methods: Medical claims data were analyzed in a retrospective, population-level cohort study in Austria between 1997 and 2014. 180,034 patients with DM were extracted and compared to 540,102 sex and age-matched controls without DM in terms of VTE risk and whether specific DM medications might modulate VTE risk. Results: The risk to develop VTE was 1.4 times higher amongst patients with DM than controls (95% CI 1.36-1.43, p < 0.001). The association of DM with newly diagnosed VTE was significantly greater in females (OR = 1.52, 95% CI 1.46-1.58, p < 0.001) resulting in a relative risk increase of 1.17 (95% CI 1.11-1.23) across all age groups with a peak of 1.65 (95% CI 1.43-1.89) between 50 and 59 years. Dipeptidyl peptidase 4 inhibitors were associated with a higher risk for VTE amongst female DM patients (OR - 2.3, 95% CI 1.3-4.3, p - 0.0096). Conclusion: Amongst DM patients, females appear to be associated with a higher relative risk increase in VTE than males, especially during perimenopause.