F8 and inflammatory bowel disease: During a mean follow-up of 8.0 years (SD =  ±  3.5) in the IBD group and a mean duration of anticoagulation (counted from the first FVIII test) of 5.6 years (SD =  ±  5.1), three patients (21%) experienced recurrent VTE, none of which happened on anticoagulant treatment (Fig. 2).