Psoas Muscle Volume as an Indicator of Sarcopenia and Disposition in Traumatic Hip Fracture Patients

Introduction

Sarcopenia, or the loss of lean muscle mass, is associated with increased morbidity and mortality as well as poor surgical outcomes. The aim of our study was to utilize computed tomography imaging to obtain the total psoas volume (TPV) as a potential marker of sarcopenia. We then investigated the relationship between TPV and outcomes in surgically managed hip fracture patients, particularly their discharge disposition.

Methods

A retrospective review of surgically managed hip fracture patients at a single institution level one American College of Surgeons verified trauma center between 2017 and 2022 was performed. The primary endpoint was patient disposition after hospitalization. TPV was collected via three dimension reconstruction of computed tomography images. Student's t-test was used to assess for association between TPV and demographic variables. Binary logistic regressions were performed to examine variables that could predict patient disposition among the patients.

Results

We identified 64 surgically managed hip fracture patients, 57.8% of whom were males, with a median age of 74 (IQR: 62, 88). Black race (244.4 vs. 190.3, P = 0.032) and younger age (252.2 vs. 181.8, P = 0.004) were associated with higher TPV. Male patients with higher TPV had a higher likelihood of being discharged home as opposed to a skilled nursing or rehabilitation facility (251.3 vs. 191.1, P = 0.02). In multivariable analysis adjusting for sex, race, body mass index, and age, males with a higher TPV were more likely to be discharged home (odds ratio: 1.012; 95% confidence interval: 1.004 1.020; P = 0.028).

Conclusions

Psoas muscle volume can be used to predict which male patients are likely to be discharged home postoperatively after surgically managed traumatic hip fracture.