Evaluation of intra- and interobserver reliability of the AO classification for wrist fractures.

Objective: This study evaluated the intraobserver and interobserver reliability of the AO classification for standard radiographs of wrist fractures.

Methods: Thirty observers, divided into three groups (orthopedic surgery senior residents, orthopedic surgeons, and hand surgeons) classified 52 wrist fractures, using only simple radiographs. After a period of four weeks, the same observers evaluated the initial 52 radiographs, in a randomized order.