ResultsThe rotation angle of the healthy-side legs of the 109 subjectsranged from 6.48 to 378, with a mean anteversion of 11.78. In theaffected-side legs of 28 (25.7%) subjects, the rotation angle showeda torsional malalignment of 158 or more, with a mean torsionalmalalignment angle of 20.78 (31.28 to 27.28). Of the 28 subjects,19 (67.8%) showed an increased anteversion that ranged from15.58 to 27.28, with a mean of 20.78 (Fig. 1). Of the 28 subjects, nine(32.2%) showed retroversion, with a mean of 20.78 (15.48 to31.28) (Fig. 2). In the malalignment group, risk factors such as thepatient’s age, gender, fracture stability, surgical sites (left or right),elapsed time for surgery after the injury, operative time, and ASAstatus were statistically analysed (Table 1). The implant, especiallydynamic hip screw and side plate showed no significantmalalignment, but the all fracture pattern which were treatedby these implants were all stable (AO type 11–21), so fracturepattern is more important than implant design. The statisticallysignificant risk factors found were fracture stability (p = 0.021) andoperative time (p = 0.043). However, operative time exhibited amulti-collinearity with fracture stability, so fracture stability wasidentified as the most direct risk factor.The VAS pain assessment result at 12 m