The disease associated to multiple births (PR * =6 CI: 1.02 - 35.2), a long-standing working ≥4 hours / day (PR * =1.14, CI: 1.03 to 1.28) and family history of varicose veins (PR * =1.58, CI: 1, 13 - 2, 22) and having sign of dilated capillary-net (PR * =4.03 CI: 1.95 to 17.1).