Research Reports (Original Article)
Preoperative Trunk Muscle Mass Predicts Patient Reported Outcome after Lumbar Spinal Fusion:
A Study Including the Skeletal Muscle Mass Index
2023 Volume 50 Issue 3 Pages 61-68
Details
2023 Volume 50 Issue 3 Pages 61-68
Objective: To clarify the relationship between the preoperative trunk muscle mass in patients after lumbar spinal fusion calculated and Patient Reported Outcome (PRO).
Methods: 86 patients who had been treated with lumbar spinal fusion for degenerative spine conditions were examined (a mean age of 70.8 years). Preoperative trunk muscle mass and Skeletal Muscle Mass Index (SMI) were calculated by bioelectrical impedance analysis. Multiple regression analysis was performed to identify predictors of postoperative PRO. The postoperative Oswestry Disability Index (ODI) and postoperative visual analogue scale (VAS) score for lower back pain at 6 months after surgery as dependent variables. The independent variables were variables that met the significance level in a single regression analysis with the dependent variable.
Results: Multiple regression analysis identified the preoperative trunk muscle mass and number of vertebrae fused as predictors of the postoperative ODI. And the Body Mass Index, preoperative trunk muscle mass, and number of vertebrae fused as predictors of the postoperative VAS score.
Conclusion: The preoperative trunk muscle mass may be more useful for predicting the postoperative ODI and VAS score than the SMI which is the conventional index used to define sarcopenia.
