FABERE test (Patrick test, "figure of four" test)

The FABERE test (Patrick test or "figure of four" test) consists of Flexion of the hip and knee, with ABduction and External Rotation at the hip, so that the ankle of one leg is on top of the opposite knee (a figure four configuration). Force is applied downwards on the bent knee and the opposite hip, causing Extension at the sacroiliac joint ipsilateral to the bent leg. Pain in the sacral region from pelvic torque during the FABERE test, in the absence of pain with passive motion of the hip joint, suggests discomfort arising from the sacroiliac joint.