Our results showed that ROM limitations associated with wrist flexion and extension along with the total number of PIPJs as well as the presence of piano key sign and boutonniere deformity were more commonly observed in the right hand.
The results for the MCPJs and PIPJs were evaluated according to the total ROM, which is the sum of the flexion and extension ROM.
Additionally, the Larsen score was calculated in the radiological evaluation, and the following 15 joints were evaluated: the four quadrants, six MCPJs, and four PIPJs of each wrist along with the interphalangeal joint (IPJ) of the two thumbs.
Significant limitations were found in the right hand compared with the left regarding wrist flexion and extension (p=0.003, r=0.617; p=0.003, r=0.742, respectively), the total number of PIPJs (p=0.001, r=0.880), and the number of affected PIPJs (p=0.001, r=0.513).