Article

OBJECTIVES: To establish and validate prediction equations by using body weight
to predict legs, trunk, and whole-body fat-free mass (FFM) in men with chronic
complete spinal cord injury (SCI). DESIGN: Cross-sectional design. SETTING: Research setting in a large medical center. PARTICIPANTS: Individuals with SCI
(N=63) divided into prediction (n=42) and cross-validation
(n=21) groups.
INTERVENTION: Not applicable. MAIN OUTCOME MEASURE: Whole-body FFM and regional
FFM were determined by using dual-energy x-ray absorptiometry. Body weight was
measured by using a wheelchair weighing scale after subtracting the weight of the
chair. RESULTS: Body weight predicted legs FFM (legs FFM=.09xbody weight+6.1;
R(2)=.25, standard error of the estimate [SEE]=3.1kg, P<.01), trunk FFM (trunk
FFM=.21xbody weight+8.6; R(2)=.56, SEE=3.6kg, P<.0001), and whole-body FFM
(whole-body FFM=.288xbody weight+26.3; R(2)=.53, SEE=5.3kg, P<.0001). The
whole-body FFM(predicted) (FFM predicted from the derived equations) shared 86%
of the variance in whole-body FFM(measured) (FFM measured using dual-energy x-ray
absorptiometry scan) (R(2)=.86, SEE=1.8kg, P<.0001), 69% of trunk FFM(measured),
and 66% of legs FFM(measured). The trunk FFM(predicted) shared 69% of the
variance in trunk FFM(measured) (R(2)=.69, SEE=2.7kg, P<.0001), and legs
FFM(predicted) shared 67% of the variance in legs FFM(measured) (R(2)=.67,
SEE=2.8kg, P<.0001). Values of FFM did not differ between the prediction and
validation groups. CONCLUSIONS: Body weight can be used to predict whole-body FFM
and regional FFM. The predicted whole-body FFM improved the prediction of trunk
FFM and legs FFM.
CI - Copyright (c) 2012 American Congress of Rehabilitation Medicine. Published by
Elsevier Inc. All rights reserved.

Langue : ANGLAIS