{"ok":true,"api":{"name":"SAIMSARA Evidence Object Discovery API","version":"v1"},"mode":"doc_key","editorial_verification":{"status":"human_reviewed","trust_label":"machine_generated_human_reviewed","method":"World ID proof-of-human editorial account","scope":["clinical_integrity","reference_quality","scientific_coherence"],"verification_note":"This Evidence Object is machine-generated and human-reviewed. World ID is used to verify that editorial oversight was submitted by a unique human account.","does_not_mean":"World ID verifies proof-of-human editorial oversight; it does not independently certify the scientific truth of every claim."},"object":{"object_type":"saimsara_evidence_object_metadata","doc_key":"vascular::VV_PREVALENCE_RISK_PM","issue_slug":"vascular","doc_id":"VV_PREVALENCE_RISK_PM","title":"Varicose Veins and Prevalence","doi":"10.62487/saimsara4781b50b","doi_url":"https://doi.org/10.62487/saimsara4781b50b","version":"2026-05-06","source_name":"PubMed","article_url":"https://saimsara.com/sessions/varicose-veins-prevalence-20260506-103632-4781b50b/","image_url":"","topic_tags":"Varicose veins,Prevalence,Risk factors,Occupational health,Chronic venous insufficiency,Body mass index,Prolonged standing,Epidemiology,Family history,Venous insufficiency","keywords":["Varicose veins","Prevalence","Risk factors","Occupational health","Chronic venous insufficiency","Body mass index","Prolonged standing","Epidemiology","Family history","Venous insufficiency"],"metrics":{"included_all":197,"included_original":174,"reference_index":104,"total_participants":1652112},"discover_url":"https://saimsara.com/api/v1/discover.php?doc_key=vascular%3A%3AVV_PREVALENCE_RISK_PM","paid_evidence_url":"https://saimsara.com/api/v1/evidence.php?doc_key=vascular%3A%3AVV_PREVALENCE_RISK_PM","price":{"amount":"4.00","currency":"USD","units":4,"unit_amount":"1.00"},"payment_methods":["api_key","stripe_checkout","object_grant","x402"],"text_length":16704,"preview":"Results Key finding aligned to the query: The prevalence of varicose veins exhibits extreme variability globally, ranging from as low as 0.1–5.5% in certain rural or minimally developed populations, to over 70% in high-risk occupational cohorts such as nurses. Across general population studies, prevalence estimates frequently fall between 10% and 40%. This wide distribution is consistently driven by a core set of risk factors, most notably advanced age, female sex, increased body mass index (BMI), and prolonged occupational standing. Original research topic synthesis: Topics are presented in an approximate qualitative evidence hierarchy, with topics supported by stronger study designs appear…","trust_label":"machine_generated_human_reviewed","editorial_verification":{"status":"human_reviewed","trust_label":"machine_generated_human_reviewed","method":"World ID proof-of-human editorial account","scope":["clinical_integrity","reference_quality","scientific_coherence"],"verification_note":"This Evidence Object is machine-generated and human-reviewed. World ID is used to verify that editorial oversight was submitted by a unique human account.","does_not_mean":"World ID verifies proof-of-human editorial oversight; it does not independently certify the scientific truth of every claim."},"checkout":{"method":"POST","url":"https://saimsara.com/create_checkout_session.php","content_type":"application/x-www-form-urlencoded","params":{"plan":"evidence_object","doc_key":"vascular::VV_PREVALENCE_RISK_PM"},"optional_params":{"customer_email":"user@example.com"},"price":{"amount":"4.00","currency":"USD","units":4,"unit_amount":"1.00"},"curl_example":"curl -X POST https://saimsara.com/create_checkout_session.php -d \"plan=evidence_object\" -d \"doc_key=vascular::VV_PREVALENCE_RISK_PM\" -d \"customer_email=user@example.com\""},"access_after_payment":{"header":"X-SAIMSARA-Payment-Proof","endpoint":"https://saimsara.com/api/v1/evidence.php?doc_key=vascular%3A%3AVV_PREVALENCE_RISK_PM","curl_example":"curl -H \"X-SAIMSARA-Payment-Proof: YOUR_PAYMENT_PROOF_TOKEN\" \"https://saimsara.com/api/v1/evidence.php?doc_key=vascular%3A%3AVV_PREVALENCE_RISK_PM\""}}}