Epidemiology of Venous Disease
|First Received Date ICMJE||May 25, 2000|
|Last Updated Date||July 6, 2005|
|Start Date ICMJE||September 1995|
|Primary Completion Date||Not Provided|
|Current Primary Outcome Measures ICMJE||Not Provided|
|Original Primary Outcome Measures ICMJE||Not Provided|
|Change History||Complete list of historical versions of study NCT00005392 on ClinicalTrials.gov Archive Site|
|Current Secondary Outcome Measures ICMJE||Not Provided|
|Original Secondary Outcome Measures ICMJE||Not Provided|
|Current Other Outcome Measures ICMJE||Not Provided|
|Original Other Outcome Measures ICMJE||Not Provided|
|Brief Title ICMJE||Epidemiology of Venous Disease|
|Official Title ICMJE||Not Provided|
To conduct several studies on the epidemiology of venous disease.
Venous disease is commonplace, more prevalent in women, increases with age, and is a major cause of morbidity. Between 6 and 30 percent of all medical expenditures for cardiovascular disease are for venous disease. Despite these facts, the basic epidemiology of venous disease has received limited attention. Even the definition of peripheral venous disease varies widely, often confusing symptoms and signs with demonstrable pathophysiologic abnormalities.
This study provided estimates of the extent of peripheral venous disease, contributed to more efficient diagnosis, allowed insight on how to prevent or ameliorate this condition through risk factor modification, and provided quantitative estimates of the daily burden this disease imposes on patients.
The overall, and age, sex, and ethnic-specific, prevalence of peripheral venous disease was determined in a stratified multiethnic random sample of 2,408 men and women aged 29 to 91 years. Three specific categories of venous disease were defined including: telangiectasias and flat reticular veins; superficial venous disease without deep valvular incompetence or obstruction; deep venous disease, with valvular incompetence or obstruction. Varicose veins were typically but not invariably present in the latter two categories. These three categories were diagnosed by an ordered non-invasive evaluation, including visual inspection, with photographic documentation of abnormal findings, and duplex color sonography to diagnose valvular incompetence and venous obstruction.
An evaluation was made of the sensitivity, specificity, and predictive value of each of the traditional signs and symptoms of venous disease for each of the three categories of venous disease. Signs and symptoms evaluated included aching, itching, swelling and edema, heaviness, cramps, nocturnal restless legs, pigmentation, induration, ulcers, and the Trendelenburg test. Risk factors were evaluated for each of the above three categories-of venous disease. Risk factors assessed included age; sex; ethnicity; socioeconomic status; height; weight; obesity; exercise; blood pressure; standing versus sitting in daily activities; family history of venous disease; cigarette smoking; alcohol consumption; diet; constipation; constrictive clothing; aspirin use; use of selected other medications; history of hernia, flat feet, or other conditions associated with connective tissue laxity; parity; use of estrogens or progestins; age at menarche; age at menopause; and concomitant arterial disease. Finally, an evaluation was made of the degree of morbidity and interference with daily activities resulting from venous disease, using the Quality of Well Being (QWB) scale developed at University of California at San Diego.
|Study Type ICMJE||Observational|
|Study Design ICMJE||Observational Model: Natural History
Time Perspective: Cross-Sectional
|Target Follow-Up Duration||Not Provided|
|Sampling Method||Not Provided|
|Study Population||Not Provided|
|Intervention ICMJE||Not Provided|
|Study Group/Cohort (s)||Not Provided|
* Includes publications given by the data provider as well as publications identified by ClinicalTrials.gov Identifier (NCT Number) in Medline.
|Recruitment Status ICMJE||Completed|
|Enrollment ICMJE||Not Provided|
|Completion Date||July 2000|
|Primary Completion Date||Not Provided|
|Eligibility Criteria ICMJE||
No eligibility criteria
|Ages||29 Years to 91 Years|
|Accepts Healthy Volunteers||No|
|Contacts ICMJE||Contact information is only displayed when the study is recruiting subjects|
|Location Countries ICMJE||Not Provided|
|NCT Number ICMJE||NCT00005392|
|Other Study ID Numbers ICMJE||4298|
|Has Data Monitoring Committee||Not Provided|
|Responsible Party||Not Provided|
|Study Sponsor ICMJE||National Heart, Lung, and Blood Institute (NHLBI)|
|Collaborators ICMJE||Not Provided|
|Information Provided By||National Heart, Lung, and Blood Institute (NHLBI)|
|Verification Date||July 2005|
ICMJE Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP