Damage assessment
There was no difference in the accrual of damage between groups. The modified Combined Damage Assessment score increased by a mean of 0.571 (SD 0.909) and 1.09 (SD 1.18) in the rituximab group compared with 0.533 (SD 0.777) and 1.38 (SD 1.65) in the azathioprine group during the maintenance phase and whole trial, respectively.