Study Of Weight-Based Versus Standard Dose Enoxaparin Thromboprophylaxis In High-Risk Hospitalized Cancer Patients

Study Overview
=================
Brief Summary
-----------------
Hospitalized patients with histologically or cytologically confirmed diagnosis of solid tumor malignancy, lymphoma, or multiple myeloma and who are at high risk for a venous thromboembolism will be randomized to standard dose versus intermediate dose enoxaparin.

Detailed Description
-----------------
In a phase II trial, high risk hospitalized cancer patients will be enrolled and randomized to standard dose enoxaparin versus intermediate dose (weight adjusted) enoxaparin thromboprophylaxis. Study subjects will be administered enoxaparin during hospitalization in a double-blinded manner. Following completion of 14 days, the study arms will be unblinded and lower extremity ultrasound performed on the standard dose enoxaparin arm in order to more accurately determine the overall cumulative incidence of thrombosis in this group.

Official Title
-----------------
A Randomized, Phase II Study Of Weight-Based Versus Standard Dose Enoxaparin Thromboprophylaxis In High-Risk Hospitalized Cancer Patients

Conditions
-----------------
Venous Thormboembolism

Intervention / Treatment
-----------------
* Drug: Enoxaparin


Participation Criteria
=================
Eligibility Criteria
-----------------
Inclusion Criteria: Participants must have histologically or cytologically confirmed diagnosis of solid tumor malignancy, lymphoma or multiple myeloma. Cancer diagnosis or received treatment (chemotherapy or radiotherapy) for malignancy within the previous 6 months One or more Padua-based risk factor: History of previous venous thromboembolic event (excluding superficial vein thrombosis) Reduced mobility (ECOG performance status 3 or 4, see Appendix A) Established hereditary thrombophilia (e.g. Factor V Leiden, G20210 prothrombin mutation, protein C or S deficiency, antithrombin deficiency). Recent surgery within the last 30 days Age ≥ 70 years Congestive heart failure (NYHA class III or IV) Complicated respiratory insufficiency (defined as an increased requirement for supplementary oxygen of at least 2L) Acute myocardial infarction or ischemic stroke Obesity (BMI ≥ 30) Receiving hormonal agents (e.g. tamoxifen, estrogen, testosterone) Acute infection (i.e. requiring antimicrobial therapy) Age ≥ 18 years Life expectancy of greater than 30 days Platelet count ≥ 100,000/mcL Creatinine < 1.5 mg/dL or estimated creatinine clearance ≥ 50 mL/min/1.73 m2 Ability to understand and the willingness to sign a written informed consent document Weight between 50kg to 130 kg. Exclusion Criteria: History of allergic reactions attributed to heparin or low molecular weight heparin Active bleeding or otherwise considered high risk for hemorrhage (e.g. known acute gastrointestinal ulcer) Any history of significant hemorrhage (requiring hospitalization or transfusion) within the last 6 months (excluding hemorrhage during operative procedure). History of heparin induced Thrombocytopenia Presence of coagulopathy (PT or PTT> 1.2 x upper limit of normal) Known diagnosis of disseminated intravascular coagulation Currently receiving therapeutic anticoagulant therapy or dual antiplatelet therapy (eg. aspirin and clopidogrel) Uncontrolled arterial hypertension (systolic blood pressure > 200mmHg, diastolic >110mmHg) Active peptic ulcer disease Bacterial Endocardititis Received any type of Pharmacologic Thromboprophylaxis (e.g. low molecular weight heparin or heparin) for >48 hours during current hospitalization Known brain metastases

Ages Eligible for Study
-----------------
Minimum Age: 18 Years

Sexes Eligible for Study
-----------------
All

Accepts Healthy Volunteers
-----------------
No

Study Plan
=================
How is the study designed?
-----------------

Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Active Comparator: A: Standard Dose Enoxaparin<br>Participants will receive Enoxaparin 40 mg subcutaneously once daily. On study Enoxaparin will be administered for up 14 days during hospitalization. After the day 14 assessment, treatment arms will be un-blinded in order to appropriately schedule a bilateral lower extremity ultrasound for participants enrolled onto Arm A at day 17. | Drug: Enoxaparin<br> <br> * Other names: Lovenox;|
| Active Comparator: B: Weight Adjusted Enoxaparin<br>Participants will receive Enoxaparin at 1mg/kg subcutaneously once daily with maximum dose of 100 mg daily. Participants who weigh more than 100kg will be capped at 100mg. On study Enoxaparin will be administered for up 14 days during hospitalization. | Drug: Enoxaparin<br> <br> * Other names: Lovenox;|

What is the study measuring?
-----------------
Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Total Number of Venous Thromboembolic Events (VTE) in Standard Dose Enoxaparin Arm at 17 Days | To investigate the numbers of VTE in hospitalized cancer patients receiving standard dose | 17 days only measured in Arm A (Standard dose enoxaparin) | 
| Number Participants With Major Hemorrhage | Number of major hemorrhage in weight-adjusted enoxaparin arm and standard-dose enoxaparin arm | 14 days | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Number of Symptomatic Venous Thromboembolic Events (VTE) | Comparing number of symptomatic VTE (data collected prior to unblinding) for the standard dose (Arm A) versus intermediate dose enoxaparin (Arm B). | 14 days |