Study designs of evaluations included in the review
Randomised controlled trials (RCTs) with control groups treated with unfractionated heparin.
Specific interventions included in the review
LMWH and unfractionated heparin (excluding Heparinoid Org-10172).
Participants included in the review
Patients with established deep venous thrombosis, as confirmed by medical examination.
Outcomes assessed in the review
Thromboembolic events (deep venous thrombosis or pulmonary embolism), major haemorrhages, total mortality and extension of thrombus were assessed.
How were decisions on the relevance of primary studies made?
The authors do not state how the papers were selected for the review, or how many of the authors performed the selection.