This study is designed to find prevalence and risk factors for chronic venous disease (CVD) in the general population. All the resident, who live in a single rural settlement will be invited to participate.

The study has cross-sectional design. All the residents aged 10 and more, living in the single rural settlement located in Central Russia will be invited to participate in the study.

Those who agree, will be examined both clinically and by duplex ultrasound. Medical history of participants will be taken, demographic data will be collected. Possible factors that may influence CVD development will be registered.

Signs and symptoms of CVD will be registered. Duplex ultrasound will be used in every resident to reveal pathological venous reflux in deep and superficial veins.

Inclusion Criteria:

• residents living in the rural settlement where study will be conducted
• both female and male
• age 10 years and more
• agree to participate
• signed infromed consent

Exclusion Criteria:

• age 9 years and less
• not signed informed consent

All the residents of 10 years and more living in the same settlement, willing to participate will be included

No IPD are going to be shared with other researchers