Isthmic spondylolisthesis (IS) is one of the most common types of spondylolisthesis, and spinopelvic parameters are closely related to the clinical symptoms of spinal diseases. In this study, investigators attempted to investigate the relationship between spinopelvic parameters and clinical symptoms of patients with low-grade (Meyerding grade I-II) isthmic spondylolisthesis (IS).~A total of 120 patients with low-grade IS and 106 asymptomatic adults were included in this study. Sex, age and body mass index (BMI) were also collected. Various spinopelvic parameters were evaluated in whole-spine standing-position X-rays. The following spinopelvic parameters were measured: pelvic incidence (PI), sacral slope (SS), pelvic tilt (PT) and lumbar lordosis (LL). The clinical symptoms of the IS patients were assessed with the Japanese Orthopaedic Association (JOA) score and the visual analogue scale (VAS). Investigators compared spinopelvic parameters between the asymptomatic adults and the IS patients. Additionally, investigators investigated correlations between spinopelvic parameters and clinical symptoms.
This was a retrospective study.PI and LL greatly influence IS and its progression. However, relationships between the spinopelvic parameters and clinical symptoms of patients with IS were not fully investigated in previous studies. Investigators hypothesized that spinopelvic parameters might be related to the clinical symptoms of IS patients. Therefore, the purpose of the present study was to investigate whether differences in spinopelvic parameters, especially spinopelvic alignment, may be associated with the clinical symptoms of low-grade IS patients.