The Journal of hand surgery
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The Eaton classification is a radiographic rating used to define the severity of basal joint arthritis. Despite widespread use, the intrarater and interrater reliability has never been determined. Seven men and 33 women, mean age 60 years (range, 31-88 y) were clinically diagnosed with basal joint arthritis. ⋯ The hand surgeons' intrarater reliability (.666) was slightly better than the residents (.648). There was a greater difference in the mean interrater reliabilities among the hand surgeons (.601) than the orthopedic residents (.487). These results are similar to those found when other orthopedic radiographic classifications have been evaluated for interrater and intrarater reliability.