Measurement of Function Post Hip Fracture: Testing a Comprehensive Measurement Model of Physical Function.
BACKGROUND
Measurement of physical function post hip fracture has been conceptualized using multiple different measures.


OBJECTIVE
This study tested a comprehensive measurement model of physical function.


METHODS
This was a descriptive secondary data analysis including 168 men and 171 women post hip fracture.


METHODS
Using structural equation modeling, a measurement model of physical function which included grip strength, activities of daily living, instrumental activities of daily living, and performance was tested for fit at 2 and 12 months post hip fracture, and among male and female participants. Validity of the measurement model of physical function was evaluated based on how well the model explained physical activity, exercise, and social activities post hip fracture.


RESULTS
The measurement model of physical function fit the data. The amount of variance the model or individual factors of the model explained varied depending on the activity.


CONCLUSIONS
Decisions about the ideal way in which to measure physical function should be based on outcomes considered and participants.


CONCLUSIONS
The measurement model of physical function is a reliable and valid method to comprehensively measure physical function across the hip fracture recovery trajectory.
University of Maryland School of Nursing, Baltimore, MD, USA.
Barbara
B
Resnick
Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, MD, USA.
Ann L
AL
Gruber-Baldini
Department of Physical Therapy, University of Delaware, Newark, DE, USA.
Gregory
G
Hicks
Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, MD, USA.
Glen
G
Ostir
University of Maryland School of Nursing, Baltimore, MD, USA.
N Jennifer
NJ
Klinedinst
Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, MD, USA.
Denise
D
Orwig
Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, MD, USA.
Jay
J
Magaziner
D000203:Activities of Daily Living; D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D015444:Exercise / Q000502:physiology*; D005260:Female; D005500:Follow-Up Studies; D018737:Hand Strength / Q000502:physiology*; D006620:Hip Fractures / Q000503:physiopathology / Q000534:rehabilitation*; D006801:Humans; D008297:Male; D011446:Prospective Studies; D016059:Range of Motion, Articular / Q000502:physiology*; D019145:Rehabilitation Nursing / Q000379:methods*; D015203:Reproducibility of Results; D012737:Sex Factors
Hip fracture; function; measurement