Hand osteoarthritis and MRI: development and first validation step of the proposed Oslo Hand Osteoarthritis MRI score.

Objectives: MRI scoring systems for hand osteoarthritis (HOA) are currently not available. The present work proposes the Oslo HOA MRI (OHOA-MRI) score and examines the intrareader and inter-reader reliability.

Methods: Relevant HOA features were included in the initial version of the OHOA-MRI score after literature review and informal group discussions.