Colitis, Ulcerative/complications; Crohn Disease/complications; Thromboembolism/epidemiology; Thrombophilia/etiology; Anticoagulants/therapeutic use; Colitis, Ulcerative/genetics; Colonic Diseases/complications; Constriction, Pathologic; Contraceptives, Oral, Hormonal/adverse effects; Crohn Disease/genetics; Family Health; Female; Heparin/therapeutic use; Hospital Units; Hospitalization; Humans; Ileal Diseases/complications; Intestinal Fistula/etiology; Male; Middle Aged; Pregnancy; Pregnancy Complications, Hematologic; Pulmonary Embolism/epidemiology; Pulmonary Embolism/etiology; Retrospective Studies; Risk; Smoking/adverse effects; Smoking/epidemiology; Spain/epidemiology; Tertiary Care Centers/statistics & numerical data; Thromboembolism/etiology; Thromboembolism/prevention & control; Thrombophilia/genetics; Venous Thrombosis/epidemiology; Venous Thrombosis/etiology