The 36-month Extension to Follow up Sub Study

April 16, 2018 updated by: Dr. Susan Kahn, Sir Mortimer B. Davis - Jewish General Hospital

The Extension to Follow up Study of the Compression Stockings to Prevent the Post-Thrombotic Syndrome (SOX Trial)

The purpose of this study is to evaluate leg health for one additional year in patients with symptomatic proximal deep venous thrombosis who did not already develop Post-Thrombotic Syndrome (PTS) during the 2 years of follow up in the SOX Trial.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Withdrawn

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Detailed Description

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) for two years following DVT could be helpful in preventing or delaying onset of PTS at three years, however data supporting this is limited.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Observational

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Canada
    • British Columbia
      • Victoria, British Columbia, Canada, V8R 4R2
        • Victoria Heart Institute Foundation
    • Manitoba
      • Winnipeg, Manitoba, Canada, R2H 2A6
        • St. Boniface General Hospital
    • Nova Scotia
      • Halifax, Nova Scotia, Canada, B3H 1V7
        • QE II Health Sciences Centre
    • Ontario
      • Hamilton, Ontario, Canada, L8N 4A6
        • St. Joseph's Healthcare Hamilton
      • Hamilton, Ontario, Canada, L8L 2X2
        • Hamilton Health Sciences - General Hospital
      • Hamilton, Ontario, Canada, L8N 3Z5
        • Hamilton Health Sciences - Chedoke Division
      • Hamilton, Ontario, Canada, L8N 3Z5
        • Hamilton Health Sciences - McMaster University Medical Centre
      • Hamilton, Ontario, Canada, L8V 1C3
        • Hamilton Health Sciences - Henderson General Hospital
      • London, Ontario, Canada, N6A 4G5
        • London Health Sciences Centre
      • Ottawa, Ontario, Canada, K1Y 4E9
        • The Ottawa Hospital, Civic Campus
      • Toronto, Ontario, Canada, M5G 2C4
        • University Health Network
      • Toronto, Ontario, Canada, M4N 3M5
        • Sunnybrook & Women's College Health Sciences Centre
    • Quebec
      • Montreal, Quebec, Canada, H4J 1C5
        • Hôpital du Sacré-Cœur de Montréal
      • Montreal, Quebec, Canada, H1T 2M4
        • Hopital Maisonneuve-Rosemont
      • Montreal, Quebec, Canada, H3T 1E2
        • Sir Mortimer B. Davis - Jewish General Hospital
      • Montreal, Quebec, Canada, H3G 1A4
        • Montreal General Hospital - McGill University Health Centre
      • Montreal, Quebec, Canada, H2L 4M1
        • Centre Hospitalier de L'Universite de Montreal - Hôpital Notre-Dame
      • Montreal, Quebec, Canada, H3T 1M5
        • St. Mary's Hospital Centre
      • Montreal, Quebec, Canada, H3A 1A1
        • Royal Victoria Hospital - McGill University Health Centre
      • Quebec City, Quebec, Canada, G1J 1Z4
        • Centre hospitalier affilié universitaire de Québec, Hôpital de l'Enfant-Jésus

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Sampling Method

Non-Probability Sample

Study Population

Subjects previously enrolled in the SOX Trial (ClinicalTrials.gov Identifier NCT00143598) who did not develop PTS by 2 years follow up.

Description

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

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

Cohorts and Interventions

Group / Cohort

Group / Cohort

A group or subgroup of participants in an observational study that is assessed for biomedical or health outcomes.
36-mth follow up visit
The cohort will consist of original subjects of the SOX Trial who consent to participate in the extension to follow up sub study.

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Time Frame
Incidence of PTS and PTS severity
Time Frame: 3 year follow up
3 year follow up

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Sir Mortimer B. Davis - Jewish General Hospital

Collaborators

Collaborators

An organization other than the sponsor that provides support for a clinical study. This support may include activities related to funding, design, implementation, data analysis, or reporting.
Canadian Institutes of Health Research (CIHR)
Heart and Stroke Foundation of Canada
Sigvaris Corporation

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
June 1, 2004

Primary Completion (Anticipated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
June 1, 2015

Study Completion (Anticipated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
June 1, 2015

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
June 1, 2012

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
June 8, 2012

First Posted (Estimate)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
June 11, 2012

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
April 18, 2018

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
April 16, 2018

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
April 1, 2018

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • MOP-102610
  • ISRCTN71334751; NCT00143598 (Registry Identifier: ISRCTN; Clinicaltrials.gov)

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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