Purpose
The impact of skeletal muscle mass and bone mineral density (BMD) on frailty after osteoporotic vertebral fractures (OVFs) remains unclear. This study aimed to assess the interplay between frailty, skeletal muscle mass, and bone mineral density in OVFs.
Materials and Methods
A total of 66 patients with osteoporotic vertebral compression fractures were enrolled. We collected clinical and radiological data, including age, body mass index (BMI), frailty index, and parameters such as lumbar lordosis, thoracic kyphosis, skeletal muscle mass, and BMD. We then analyzed the relationships between frailty and these variables.
Results
The mean age, BMI, BMD T-score, skeletal muscle mass, and frailty index were 78.0±7.8 years, 22.3±3.3 kg/ m², -3.59±0.96, 37.84±6.24 kg, and 2.59±1.08, respectively. Of the 66 patients, 14 (21.1%) were frail prior to fracture, while 37 (56.1%) were frail after fracture, indicating a worsening frailty status. Specifically, 23 patients (34.8%) transitioned from pre-frail to frail following their fracture and had both lower BMD (T-score: -3.7±0.93) and lower skeletal muscle mass (35.74±3.83 kg). Frailty was negatively correlated with BMD (r=-0.28, p=0.02), while BMD was positively correlated with skeletal muscle mass (r=0.29, p=0.02). OVFs were positively correlated with frailty (r=0.33, p=0.01), especially in terms of fatigue (r=0.31, p=0.01) and ambulation (r=0.21, p=0.01).
Conclusions
In patients with osteoporotic vertebral fractures, decreased muscle mass and low BMD appear to exacerbate frailty. Furthermore, frailty may be both a contributing and a resulting factor in the development of osteoporotic vertebral fractures.
