Table 4 Regression analysis of the combination of CF-LFN and FA-CLT and postoperative stem anteversion in the CF group (the regression formula was presented as y = ax1 + bx2 + c; a: FA-CLT coefficient, b: CF-LFN coefficient, c: y-intercept). A strong positive correlation was noted between the combination and the postoperative stem anteversion in the CF group