Study design
blindness
BLINDNESS
Before operation, imaging study was performed for measuring the radiological parameters of joint displacement (palmar tilt, radial high, radial inclination, articular step and wrist alignment). These measurements were conducted before allocation of patients to either group in order to ensure blindness of data. The letters A and B were used for conventional treatment; the letters C and D were used considered for our proposed method of treatment, before randomization to conceal the group assignment. Patients were then randomly allocated (1:1 ratio) to one of the two groups using block randomization method (block size: 4, block number: 15, permutation number: 24) by a biostatistician, and one group was set to undergo external fixation operation applying fixator parallel to radius shaft (group A = 30) and the other group with external fixator perpendicular to the distal radius articular surface (group B = 30) (Fig. 