Reliability and sensitivity to change of various measures of hand functionin relation to treatment of synovitis of the metacarpophalangeal joint in rheumatoid arthritis

Objectives. The reliability and discriminative capacity of hand function te sts were studied in order to obtain tests suitable for the evaluation of lo cal treatment of an arthritic metacarpophalangeal (MCP) joint. Methods. To assess reliability, hand function tests were measured twice wit hout local treatment of the MCP in 25 patients with rheumatoid arthritis (R A). The discriminative capacity of the hand function tests with respect to the results of intra-articular corticosteroid injection was assessed in 28 RA patients with synovitis of an MCP joint. Thereafter, a randomized, obser ver-blind treatment study was performed in 21 RA patients with synovitis of an MCP joint; 10 of the patients were treated. Results/Conclusions. This study showed that the efficacy of treatment of an MCP joint can be measured by several reliable and discriminative parameter s: passive flexion, the Ritchie pain score, swelling, the Arthritis Impact Measurements Scales question about buttoning clothes. and visual analogue s cale questions about the activity of the disease and swelling of the joint.