Incidence of Superficial Vein Thrombosis

Study Overview
=================
Brief Summary
-----------------
To date, the investigators still do not know the annual incidence of Superficial Vein Thrombosis in the legs, although the investigators do know that this pathology is frequent and the investigators can assume its incidence is greater than Deep Vein Thrombosis which is of 1 to 2 cases per year per 1,000 inhabitants. Furthermore, the high percentage of SVT with concomitant DVT and Pulmonary Embolism only concerns patients seen in vascular medicine, so it is important to re-evaluate this rate on an unselected population from general practice.

Detailed Description
-----------------
The method is a prospective observational study involving all the general practitioners and vascular physicians of the Saint Etienne region, i.e. 276 general practitioners, 27 vascular physicians and 341,822 inhabitants. Any new case of symptomatic SVT in the legs suspected by the general practitioner and confirmed by compression ultrasonography by the vascular physician would be listed over one year. The confirmed SVTs, directly seen by the vascular physicians would also be listed. The incidence would be calculated by relating the total number of SVTs observed to the number of inhabitants of the Saint Etienne region. Information on whether concomitant DVT exists or not at the time of the compression ultrasonography would also be collected.

Official Title
-----------------
Evaluation of Annual Incidence of Superficial Vein Thrombosis in the Legs

Conditions
-----------------
Superficial Vein Thrombosis

Intervention / Treatment
-----------------
* Other: consultation with a vascular physician


Participation Criteria
=================
Eligibility Criteria
-----------------
Inclusion Criteria: inhabitants of the Saint Etienne region with suspected SVT consulting general practitioners and or vascular physicians of the Saint Etienne region Exclusion Criteria: SVT not confirmed by compression ultrasonography

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

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

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

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

Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| patients with suspected SVT<br>patients with suspected SVT and inhabitants of the Saint Etienne region | Other: consultation with a vascular physician<br>* As in usual practice, patient with suspected SVT will consult a vascular physician to diagnose SVT and eventually DVP/PE associated. Vascular physician will collect risk factors of SVT.<br>|

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

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| symptomatic SVT | new case of symptomatic SVT in the legs suspected by the general practitioner and confirmed by compression ultrasonography by the vascular physician | 1 year | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| SVT risk factors | SVT risk factors will be collected during consultation with vascular physician. They are: varicose veins, history of thromboembolism, autoimmune disease,cancer, immobilization, recent surgery | 1 year | 
| SVT Clinical signs | SVT clinical signs will be collected during consultation with general practitioner and or vascular physician. They are: palpable cords, pain, erythematous area and surrounding edema. | 1 year | 

 Terms related to the study
=================
Keywords Provided by Centre Hospitalier Valida
-----------------
superficial vein thrombosis, Saint Etienne region