Standardized mortality ratios.

aSMRs are calculated with the nonthrombosis cohort as a reference.
bSMRs are calculated with the controls with the same selection criteria as the patients as a reference.
cIndividuals with malignancy excluded.
dIdiopathic venous thrombosis were those without malignancy, surgery, hospital admission, injuries, plaster, oral contraceptive use, and pregnancy or puerperium.
DVT, patients with a first venous thrombosis of the leg without malignancies; DVT+PE, patients diagnosed with both PE and DVT without malignancies; PE, patients with a first PE without a diagnosis of a DVT without malignancies.