This trial is active, not recruiting.

Condition thrombosis
Treatment observation
Sponsor University of Chicago
Start date February 2001
End date March 2001
Trial size 645 participants
Trial identifier NCT00203970, 10895A


The purpose of this research is to gain insight into the way in which physicians adopt new practice techniques. In particular, we are interested in how medical innovations diffuse throughout social networks. We wish to examine the diffusion of Low Molecular Weight Heparin (LMWH) use for Deep Vein Thrombosis (DVT) throughout the social network of general internal medicine interns, residents, and attendings at the University of Chicago Hospital. In numerous clinical trials, LMWH has been demonstrated to be as effective as unfractionated heparin as a bridge to long-term anticoagulation therapy with Coumadin, with the added benefit of early discharge from the hospital with easy dosing, no need for monitoring, and home therapy. A DVT critical pathway was established at the U of C in 1998, and LMWH was used off-label for that purpose beginning in 1997. However, it is unclear how quickly the use of LMWH was adopted by the physicians on the general medicine services, or whether there exists a pattern for this adoption.

United States No locations recruiting
Other countries No locations recruiting

Study Design

Observational model cohort
Time perspective retrospective

Primary Outcomes

retrospective chart review to determine how patients with deep venous thromboses or pulmonary emboli were treated when hospitalized on the medicine services
time frame: June 1997 to December 2000

Eligibility Criteria

Male or female participants at least 18 years old.

Inclusion Criteria: - Patients admitted to General Medicine Services with a primary or secondary diagnosis related to venous thromboembolism Exclusion Criteria: - Non-General Medicine Services patients

Additional Information

Official title Diffusion of Use of Low Molecular Weight Heparin for Thrombosis on the Medicine Services
Principal investigator David Meltzer, M.D., Ph.D.
Description The design of our study is retrospective in nature. We are interested primarily in the use of LMWH in patients admitted to the general medicine services between January 1, 1997 and February 1, 2001 with a primary and secondary diagnosis related to Venous Thromboembolism, including specific ICD-9 codes. Using a data abstraction form, we gather the following information: 1) patient demographics, 2) identity of the attending, resident, and interns caring for the patient, 3) whether the patient had any absolute or relative contraindications for receiving LMWH, as delineated by the DVT critical pathway, including insurance status and 4)how the patient was treated for his/her condition. To examine whether the identity of the primary care physician affects whether LMWH is given, we also collect the name of the primary care physician if it is listed on the chart.
Trial information was received from ClinicalTrials.gov and was last updated in May 2016.
Information provided to ClinicalTrials.gov by University of Chicago.