Figure 3.

(a) Improvement rate of anterior disc height. The rate of improvement in the anterior intervertebral disc height was significantly higher in the O group. (b) Improvement rate of posterior disc height. (c) Improvement rate of segmental focal angle. There was no significant difference in the posterior disc height and rate of improvement between the O and T groups at one month postoperatively and at the final evaluation. Abbreviations: T group, patients who underwent single-level transforaminal lumbar interbody fusion; O group, patients who underwent single-level oblique lateral interbody fusion.