Objectives:
This study aimed to determine whether the phase angle is associated with physical
function at discharge and discharge destination in patients with osteoporotic fragile
fractures.
Methods:
This retrospective cohort study included patients with fragile osteoporotic fractures
who were admitted to a convalescent rehabilitation ward. The phase angle was calculated
using a body composition meter and bioelectrical impedance analysis. The primary outcome
was the Functional Independence Measure motor (FIM-motor) score at discharge, and the
secondary outcome was discharge to home. Multivariate analysis was used to determine the
association between phase angle and FIM-motor scores at discharge and discharge to
home.
Results:
The study included 127 patients (108 women, age 81.2 ± 9.7 years). The median phase
angle on admission was 4.1° for men and 3.6° for women. The median FIM-motor score at
discharge was 83, with 92 (72.4%) patients discharged home and 35 (27.6%) discharged to
a destination other than home. Multiple regression analysis adjusted for confounders
revealed a significant independent association between the phase angle and FIM-motor
score at discharge (β=0.262, P=0.019). However, no significant association was found
between phase angle and discharge destination (odds ratio, 1.350; 95% confidence
interval: 0.680–2.670, P=0.391).
Conclusions:
Phase angle was independently associated with physical function at discharge in
patients with fragile osteoporotic fractures. For patients with a reduced phase angle on
admission, a multidisciplinary approach, including exercise, nutrition, oral health, and
medication, should be implemented to maximize improvement in physical function.