Diameter of ovarian veins on abdominal CTs as well as data from medical records including gynecological examinations: PCS-associated symptoms of interest included chronic or recurrent abdominal, back and flank pain, dyspareunia, ovarian point tenderness on bimanual examination, urological symptoms (dysuria, urinary frequency, urgency, hematuria), and vulvar and lower extremity varicosities. As well as demographic information: menopausal status, age, ethnicity, height, body mass index (BMI), blood group, gravidity, parity, birth weights of children, method of contraception, position of uterus (ante- or retroverted), smoking, alcohol consumption and signs of infection as measured in blood tests (CPR, leucocytes).