What finding during the Craig's test indicates retroversion?

The Craig's test is designed to assess the degree of femoral anteversion or retroversion. In this test, the patient's hip is passively rotated, and the degree of medial rotation is measured while aligning the patella with the foot.

When evaluating femoral retroversion, a finding of less than 8 degrees of rotation indicates that the femur is positioned more posteriorly or retroverted. This means the femoral neck is retroverted relative to the femoral condyles, suggesting the hip is less likely to rotate medially, which is characteristic of retroversion.

In contrast, greater than 15 degrees typically indicates femoral anteversion, while a range of 8-15 degrees may be considered normal or a transitional state. The value of being within 20 degrees of full extension is not directly indicative of retroversion in the context of this test.

Thus, the significance of less than 8 degrees is important for determining femoral retroversion, making it the correct finding for this assessment.