|PT result||APTT result||Common condition present
||Liver disease, decreased Vitamin K, decreased or defective factor VII
||Haemophilia A or B (decreased or defective factor VIII or IX) or factor XI deficiency, von Willebrand disease, factor XII deficiency, or lupus anticoagulant present
||Decreased or defective factor I (fibrinogen), II (prothrombin), V or X, severe liver disease, disseminated intravascular coagulation (DIC)
||Normal or slightly prolonged
||May indicate normal hemostasis; however, PT and PTT can be normal in conditions such as mild deficiencies in other factors and mild form of von Willebrand disease. Further testing may be required to diagnose these conditions.