Table 2.

The Changes of Posterolateral Graft with Time

Alcohol : Patient consumed>40 g alcohol/day (i.e., alcoholic), T-score of BMD (Bone Mineral Density) : Measured using Dual Energy X-ray absorptiometry in L2-L4, BMI : Body Mass Index [Weight (kg)/Height^2 (m)], SPL : spondylolisthesis, ST : stenosis, 3D : fusion stage on postoperative 3 day image, 1M : fusion stage on postoperative 1 month image, 3M : fusion stage on postoperative 3 month image, 6M : fusion stage on postoperative 6 month image, 12M : fusion stage on postoperative 12 month image. F : fusion failure (absence of fusion bridge), NI : no image was obtained, F/L : follow-up loss