Observational StudyMeasurement of Adherence and Health-Related Quality of Life, and Health-Care Resource Utilization

Inclusion Criteria:

1. Adult (≥ 18 years) female or male subjects.
2. Confirmed symptomatic proximal or distal lower extremity deep venous thrombosis with or without pulmonary embolism or other venous thromboses. For a symptomatic lower extremity deep venous thrombosis confirmed by compression ultrasonography, venography, or specific computerized tomography (CT) venography, or a thrombus detected in the iliac veins on an abdominal or pelvic CT. For symptomatic pulmonary embolism confirmed by computerized tomographic pulmonary angiography, ventilation perfusion scan, or catheter pulmonary angiography.
3. Cancer (other than basal-cell or squamous-cell carcinoma of the skin), either active or diagnosed within 2 years prior to VTE. The diagnosis of cancer must be objectively documented by histopathologic diagnosis.
4. Intention for long-term treatment (at least 3 months) with anticoagulation.
5. Participants will be enrolled in the study within the first 5 days from initiation of anticoagulation.
6. Able to provide informed consent and complete study survey tools
7. Able to read and speak English.

Exclusion Criteria:

1. Indication for anticoagulation other than cancer-related VTE.
2. An Eastern Cooperative Oncology Group (ECOG) Performance Status of 4 at the time of study enrollment.
3. Life expectancy < 3 months.
4. Isolated pulmonary embolism, or isolated upper extremity deep venous thrombosis, or isolated splanchnic venous thrombosis, or isolated cerebral venous thrombosis confirmed by compression ultrasonography, venography, or CT.