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PHYS THER
Vol. 74, No. 2, February 1994, pp. 175-176
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Paul C LaStayo and Donna L Wheeler

This excerpt was created in the absence of an abstract.

We agree with Mr Flowers that alignment with the readily visible fifth metacarpal may be more accurate, but we disagree that improved accuracy might always enhance reliability when measuring wrist flexion and extension. Previous goniometric studies of the wrist1,2 demonstrated that using the readily available fifth metacarpal resulted in poorer reliability when compared with using other anatomical landmarks. If Mr Flowers' assumption is correct, the results of our study and the previous two reliability studies would have produced different findings for reliability. To understand this further, one must appreciate that accuracy and precision are only two variables that may have an effect on a measurement and its reliability. Specifically, accuracy and precision characterize how close a measurement comes to a true value.3 On the other hand, reliability, or the stability between different sets of measurements, may be high even when the measurements do not actually represent the true values....


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Related Articles

Reliability of Passive Wrist Flexion and Extension Goniometric Measurements: A Multicenter Study
Paul C LaStayo and Donna L Wheeler
Physical Therapy 1994 74: 162-174. [Abstract] [PDF]

Invited Commentary
Kenneth R Flowers
Physical Therapy 1994 74: 174-175. [Abstract] [PDF]





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Copyright © 1994 by the American Physical Therapy Association.