Femoral neck fracture: the reliability of radiologic classifications.

The revised 2018 AO/OTA classification simplified the previous classification of intracapsular fracture but remain unreliable with only fair interobserver reliability. The simplified AO/OTA classification show a reliability similar to Garden classification, with a moderate interobserver reliability. The experience of the surgeons seems not to improve reliability. No classification has been shown to be superior in terms of reliability.