Effect of long spinal fusion including the pelvis on activities of daily living related to lumbar spinal function in adults with spinal deformity.

BACKGROUND: Spinal sagittal malalignment is managed by long spinal fusion including the pelvis, which reduces lumbar spine range of motion and impairs the activities of daily living. This study aimed to evaluate the changes in activities of daily living after long spinal fusion in adults with spinal deformity, and clarify the improvement or deterioration in the specific activities of daily living postoperatively.

METHODS: We retrospectively reviewed 40 adults who underwent long spinal fusion in a single institution between 2014 and 2016 (female/male, 39/1; mean age, 68.5 years; range, 52-79 years). Each patient undertook three self-assessed health-related quality of life measures preoperatively and again at 2-years postoperatively: Oswestry Disability Index (ODI), Scoliosis Research Society (SRS)-22 questionnaire, and Japanese Orthopaedic Association back pain evaluation questionnaire (JOABPEQ). Radiographic outcomes were measured preoperatively and at 2 years postoperatively.

RESULTS: Total ODI and all SRS-22 domains were improved at 2 years postoperatively. The JOABPEQ scores were also improved in all domains, except lumbar function. The change in pelvic incidence minus lumbar lordosis correlated with improvements in total ODI, SRS-22 function, and self-image scores. At 2 years postoperatively, satisfaction was correlated with total ODI, all SRS-22 domains, and the JOABPEQ pain domain. Subclass analysis of the JOABPEQ lumbar function domain at 2 years postoperatively revealed that 65% of patients had difficulty 'putting on socks or stockings', 42% had great difficulty 'bending forward, kneeling, or stooping', 32% reported improvement in 'sit to stand', and 32% reported deterioration in 'putting on socks or stockings' after surgery compared with before surgery. The JOABPEQ lumbar function domain was not correlated with the SRS-22 satisfaction domain.

CONCLUSIONS: Despite restricting lumbar function, spinopelvic fusion improves health-related quality of life. Surgeons and patients should discuss potential changes and limitations in the activities of daily living after long spinal fusion including the pelvis.