Abstract
BACKGROUND: Lateral access surgery (LAS) for lumbar degenerative spondylolisthesis is a minimally invasive lumbar fusion technique which has been gaining increasing popularity in the recent years. This study aims to identify perioperative factors that influence postoperative satisfaction after LAS for lumbar degenerative spondylolisthesis. METHODS: From August 2010 to November 2014, 52 patients with lumbar degenerative conditions (16 male: 36 female, mean age 64.0 ± 8.7 years) were prospectively recruited and underwent LAS by a single surgeon. All patients were assessed preoperatively and 2 years postoperatively with Numerical Pain Rating Scale (NPRS), Oswestry Disability Index, Short-Form 36 (SF-36) scores, North American Spine Society score for neurogenic symptoms, patient satisfaction, and expectation fulfillment. Cobb angles, global lumbar lordosis, disc heights, adjacent disc heights, fusion, and subsidence were rates assessed. Multiple linear regression performed with satisfaction as dependent variable to identify predictive independent variables. RESULTS: Lower preoperative SF-36 general health scores (P = .03), higher NPRS leg pain scores (P = .04), and longer surgical duration (P = .02) were significant predictors of lower satisfaction (P < .05). NPRS back and leg pain decreased by 80.3 and 83.0%, respectively. Oswestry Disability Index and North American Spine Society score for neurogenic symptoms improved by 76.2 and 75.9%, respectively. Ninety percent of patients reported excellent/good satisfaction. Significant correction and maintenance of Cobb and global lumbar lordosis angles were achieved. There was significant increase in disc heights postoperatively (P = .05) and no significant difference in adjacent disc heights at 2 years (P > .05). Ninety-eight percent of patients achieved Bridwell Fusion Grade 1, and 5.8% had Marchi Grade 3 subsidence. CONCLUSIONS: Lower preoperative SF-36 general health, higher NPRS leg pain, and longer surgical duration are predictors of lower satisfaction in patients undergoing LAS for lumbar degenerative spondylolisthesis. LEVEL OF EVIDENCE: III. CLINICAL RELEVANCE: Identifying preoperative predictors for postoperative clinical outcome can assist clinicians in patient education prior to operation.