The SOX Trial: Compression Stockings to Prevent the Post-Thrombotic Syndrome

NCT ID: NCT00143598

Last Updated: 2014-08-18

Study Results

Results available

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Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

PHASE3

Total Enrollment

806 participants

Study Classification

INTERVENTIONAL

Study Start Date

2004-06-30

Study Completion Date

2012-02-29

Brief Summary

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The purpose of this study is to determine whether elastic compression stockings used for 2 years are effective in preventing the post-thrombotic syndrome in patients with symptomatic proximal deep venous thrombosis.

Detailed Description

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The post-thrombotic syndrome (PTS) is a frequent, burdensome and costly condition that occurs in about one third of patients after an episode of deep vein thrombosis (DVT). Affected patients have chronic leg pain and swelling, and sometimes develop skin ulcers. At present, there is little to offer for the treatment of this condition. Prevention of PTS is the key to reducing its burden on patients and society. Elastic compression stockings (ECS) could be helpful in preventing PTS, however data on their effectiveness are scarce and conflicting.

Comparison(s): Knee-length, 30-40 mm Hg (Class II), graduated ECS worn on the DVT-affected leg daily for 2 years compared to knee-length, inactive (i.e. no compression) stocking, identical in appearance to active ECS, worn on the DVT-affected leg daily for 2 years.

Conditions

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Deep Venous Thrombosis

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

PREVENTION

Blinding Strategy

TRIPLE

Participants Investigators Outcome Assessors

Study Groups

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Active ECS

Active Elastic Compression Stockings (ECS) 30-40 mm Hg compression at the ankle.

Group Type ACTIVE_COMPARATOR

Knee-length, graduated elastic compression stocking

Intervention Type DEVICE

Worn daily for 2 years, 30-40 mm Hg

Placebo ECS

Placebo stockings with identical appearance to Active ECS and with \< 5 mm Hg compression at the ankle.

Group Type PLACEBO_COMPARATOR

Knee-length, placebo stocking

Intervention Type DEVICE

Worn daily for two years

Interventions

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Knee-length, graduated elastic compression stocking

Worn daily for 2 years, 30-40 mm Hg

Intervention Type DEVICE

Knee-length, placebo stocking

Worn daily for two years

Intervention Type DEVICE

Eligibility Criteria

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Inclusion Criteria

* Consecutive patients with a first, symptomatic, objectively confirmed proximal DVT diagnosed within the last 14 days (with or without concurrent distal DVT or pulmonary embolism)
* Who have no contraindications to standard treatment with heparin and/or warfarin, and
* Who provide informed consent to participate

Exclusion Criteria

* Contraindication to compression stockings
* Limited lifespan (estimated \< 6 months)
* Geographic inaccessibility preventing return for follow-up visits
* Inability to apply stockings daily and unavailability of a caregiver to apply stockings daily
* Treatment of acute DVT with thrombolytic agents
Minimum Eligible Age

18 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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Canadian Institutes of Health Research (CIHR)

OTHER_GOV

Sponsor Role collaborator

Sigvaris Corporation

INDUSTRY

Sponsor Role collaborator

Sir Mortimer B. Davis - Jewish General Hospital

OTHER

Sponsor Role lead

Responsible Party

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Dr. Susan Kahn

SOX Trial Principal Investigator

Responsibility Role PRINCIPAL_INVESTIGATOR

Principal Investigators

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Susan R. Kahn, M.D., M.Sc.

Role: PRINCIPAL_INVESTIGATOR

Sir Mortimer B. Davis - Jewish General Hospital

Locations

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Henry Ford Health Systerm

Detroit, Michigan, United States

Site Status

Duke University Medical Center

Durham, North Carolina, United States

Site Status

Oklahoma University Health Sciences Center

Oklahoma City, Oklahoma, United States

Site Status

Victoria Heart Institute Foundation

Victoria, British Columbia, Canada

Site Status

St. Boniface General Hospital

Winnipeg, Manitoba, Canada

Site Status

QE II Health Sciences Centre

Halifax, Nova Scotia, Canada

Site Status

Hamilton Health Sciences - General Hospital

Hamilton, Ontario, Canada

Site Status

Hamilton Health Sciences - Chedoke Division

Hamilton, Ontario, Canada

Site Status

Hamilton Health Sciences - McMaster University Medical Centre

Hamilton, Ontario, Canada

Site Status

St. Joseph's Healthcare Hamilton

Hamilton, Ontario, Canada

Site Status

Hamilton Health Sciences - Henderson General Hospital

Hamilton, Ontario, Canada

Site Status

London Health Sciences Centre

London, Ontario, Canada

Site Status

The Ottawa Hospital, Civic Campus

Ottawa, Ontario, Canada

Site Status

Sunnybrook & Women's College Health Sciences Centre

Toronto, Ontario, Canada

Site Status

University Health Network - Toronto General Hospital

Toronto, Ontario, Canada

Site Status

Centre Hospitalier Pierre-Boucher

Longueuil, Quebec, Canada

Site Status

Hôpital Maisonneuve-Rosemont

Montreal, Quebec, Canada

Site Status

Centre Hospitalier de l'Université de Montréal - Hôpital Notre-Dame

Montreal, Quebec, Canada

Site Status

Centre Hospitalier de l'Université de Montréal - Hôpital Hôtel-Dieu

Montreal, Quebec, Canada

Site Status

Royal Victoria Hospital - McGill University Health Centre

Montreal, Quebec, Canada

Site Status

Sir Mortimer B. Davis - Jewish General Hospital

Montreal, Quebec, Canada

Site Status

St. Mary's Hospital Center

Montreal, Quebec, Canada

Site Status

Montreal General Hospital - McGill University Health Centre

Montreal, Quebec, Canada

Site Status

Hôpital du Sacré-Coeur de Montréal

Montreal, Quebec, Canada

Site Status

Centre hospitalier affilié universitaire de Québec, Hôpital de l'Enfant-Jésus

Québec, Quebec, Canada

Site Status

Countries

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United States Canada

References

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Kahn SR, Shbaklo H, Shapiro S, Wells PS, Kovacs MJ, Rodger MA, Anderson DR, Ginsberg JS, Johri M, Tagalakis V; SOX Trial Investigators. Effectiveness of compression stockings to prevent the post-thrombotic syndrome (the SOX Trial and Bio-SOX biomarker substudy): a randomized controlled trial. BMC Cardiovasc Disord. 2007 Jul 24;7:21. doi: 10.1186/1471-2261-7-21.

Reference Type BACKGROUND
PMID: 17711595 (View on PubMed)

Kahn SR, Shapiro S, Wells PS, Rodger MA, Kovacs MJ, Anderson DR, Tagalakis V, Houweling AH, Ducruet T, Holcroft C, Johri M, Solymoss S, Miron MJ, Yeo E, Smith R, Schulman S, Kassis J, Kearon C, Chagnon I, Wong T, Demers C, Hanmiah R, Kaatz S, Selby R, Rathbun S, Desmarais S, Opatrny L, Ortel TL, Ginsberg JS; SOX trial investigators. Compression stockings to prevent post-thrombotic syndrome: a randomised placebo-controlled trial. Lancet. 2014 Mar 8;383(9920):880-8. doi: 10.1016/S0140-6736(13)61902-9. Epub 2013 Dec 6.

Reference Type RESULT
PMID: 24315521 (View on PubMed)

Kahn SR, Shapiro S, Ducruet T, Wells PS, Rodger MA, Kovacs MJ, Anderson D, Tagalakis V, Morrison DR, Solymoss S, Miron MJ, Yeo E, Smith R, Schulman S, Kassis J, Kearon C, Chagnon I, Wong T, Demers C, Hanmiah R, Kaatz S, Selby R, Rathbun S, Desmarais S, Opatrny L, Ortel TL, Galanaud JP, Ginsberg JS. Graduated compression stockings to treat acute leg pain associated with proximal DVT. A randomised controlled trial. Thromb Haemost. 2014 Dec;112(6):1137-41. doi: 10.1160/TH14-05-0430. Epub 2014 Aug 28.

Reference Type DERIVED
PMID: 25183442 (View on PubMed)

Related Links

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http://clinicaltrials.gov/ct2/show/NCT01615705

Biomarker Sub Study of the Compression Stockings to Prevent the Post-Thrombotic Syndrome (SOX) Trial (Bio-SOX)

Other Identifiers

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ISRCTN71334751

Identifier Type: REGISTRY

Identifier Source: secondary_id

MCT-63142

Identifier Type: -

Identifier Source: org_study_id

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