[Correlation analysis between the psoas muscle index and adjacent vertebral refracture after percutaneous...

To investigate the correlation between the psoas muscle index (PMI) and the occurrence of adjacent vertebral compression fractures (AVCF) after percutaneous vertebroplasty (PVP) for osteoporotic vertebral compression fractures (OVCF).

Data from OVCF patients who underwent PVP between January 2018 and January 2023 were collected. A total of 217 patients meeting the inclusion and exclusion criteria were enrolled,including 66 males and 151 females,aged 59 to 89 years. Regarding the number of surgical vertebrae,185 cases involved a single vertebra and 32 cases involved two vertebrae. Based on the occurrence of adjacent vertebral refracture,patients were divided into two groups:37 cases with refracture in the AVCF group included 12 males and 25 females with a mean age of(74.55±4.20) years,PMI at initial surgery was(4.87±0.22) cm²·m^-2;and 180 cases without refracture in the NAVCF group included 54 males and 126 females with a mean age of (73.37±5.16) years,PMI at initial surgery was (6.07±0.32) cm²·m^-2. The correlation between the gender,age,number of surgical vertebrae,PMI at initial PVP treatment,whether anti-osteoporosis treatment,whether scoliosis,and whether coexisting chronic diseases and the postoperative adjacent vertebral refracture were analyzed.

All patients were followed up for at least one year. No statistically significant differences (P>0.05) were found between two groups regarding gender,age,number of surgical vertebrae,anti-osteoporosis treatment,presence of degenerative scoliosis,or presence of chronic diseases. However,a statistically significant difference(P<0.05) was observed in PMI between two groups. Further Point-biserial correlation analysis revealed a significant correlation between PMI and the occurrence of AVCF after PVP in OVCF patients(r=0.824,P<0.01).

The psoas muscle index is a significant risk factor for adjacent segment re-fracture after percutaneous vertebroplasty for osteoporotic fractures. A lower PMI value is associated with a higher likelihood of adjacent vertebral re-fracture following PVP.