Objective. To investigate the correlation of psoas muscle index (PMI) with fragility vertebral fracture. Methods. A total of 184 middle-aged and elderly women were included in the study. We measured the bilateral psoas muscle area on the picture archiving and communication system (PACS) from computed tomography images and calculated PMI. We observed lateral radiographs of the thoracolumbar spine and assessed vertebral fractures using the Genant semiquantitative method. The T-score, bone mineral density (BMD) of the lumbar (L)1-4, femoral neck, and trochanter were measured by dual-energyX-ray absorptiometry (DXA). The data was collected and then statistically analyzed. Results. The PMI of the nonosteoporosis group was higher than that of the osteoporosis group ( P value = 0.006). Height in the nonosteoporosis group was higher than that in the osteoporosis group ( P value = 0.013). Weight, body mass index (BMI), left psoas muscle area, BMD of the L1-4, femoral neck, femoral trochanter, and T-score in the nonosteoporosis group were higher than those in the osteoporosis group ( P value <0.001). The right psoas muscle area in the nonosteoporosis group was higher than that in the osteoporosis group ( P value = 0.008). The incidence of combined thoracolumbar fracture was significantly higher in the osteoporosis group than that in the nonosteoporosis group ( P value <0.001). For nonosteoporosis subjects, the PMI of the vertebral fracture group was lower than that of the nonvertebral fracture group ( P value = 0.034). Conclusions. A decrease in height, weight, BMI, bilateral psoas muscle area, and PMI is associated with osteoporosis. Combined thoracolumbar fractures are more common in osteoporosis. Sarcopenia may be an independent risk factor for nonosteoporotic vertebral fractures.
Purpose To investigate the correlation of psoas muscle index(PMI) with bone mineral density(BMD) and vertebral fractures in postmenopausal women Methods A total of 184 postmenopausal female patients who were admitted to our hospital from January 2021 to December 2021 were included in the study. We measured the cross-sectional area of the psoas major on both sides (at the level of the lower border of the Lumbar (L)3 vertebrae) by computed tomography (CT), and then calculated the PMI. We measured the BMD of the study subjects’ lumbar spine and hip joint by dual-energy X-ray absorptiometry (DXA). According to the T value, the subjects were divided into the osteoporosis group (T value≤-2.5) and the non-osteoporosis group (T value>-2.5). Then, they were further grouped according to whether they had vertebral fractures. The data was collected and then statistically analyzed. Results Height, weight, body mass index(BMI), bilateral psoas major area, and PMI of the non-osteoporosis group were higher than those of the osteoporosis group (P < 0.05). There was no significant difference in age, age of amenorrhea, and incidence of spinal fractures between the two groups (P > 0.05). BMD of the L1-3 vertebrae, femoral neck, and femoral trochanter was positively correlated with the PMI (P < 0.05). For non-osteoporosis subjects, the PMI of the vertebral fracture group was lower than that of the non-vertebral fracture group (P < 0.05). There was no significant difference in the PMI for patients with osteoporosis between the vertebral fracture and non-vertebral fracture groups (P > 0.05). Conclusions Postmenopausal women with osteoporosis have lower skeletal muscle mass than those without osteoporosis. Decreased lumbar spine and hip BMD are associated with decreased skeletal muscle mass in postmenopausal women. Sarcopenia may be an independent risk factor for spinal fractures in postmenopausal women without osteoporosis.
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