did not achieve significanceP = 0.105
Postoperative C2T (β = 0.144, P = 0.046) and ΔC7-CSVL (β = 0.592, P = 0.032) remained significant predictors of PFF while T1PA (β = 0.059, P = 0.195) and bone density did not achieve significance (β = −0.606, P = 0.105).