Article

Knee osteoarthritis (KOA) is the most common osteoarthritis in lower limbs, and
gait measurement is important to evaluate walking function of KOA patients before
and after treatment. The third generation Intelligent Device for Energy
Expenditure and Activity (IDEEA3) is a portable gait analysis system to evaluate
gaits. This study is to evaluate the accuracy and reliability of IDEEA3 for gait
measurement of KOA patients. Meanwhile, gait differences between KOA patients and
healthy subjects are examined. Twelve healthy volunteers were recruited for
measurement comparison of gait cycle (GC), cadence, step length, velocity and
step counts between a motion analysis system and a high-speed camera (GoPro
Hero3). Twenty-three KOA patients were recruited for measurement comparison of
former five parameters between GoPro Hero3 and IDEEA3. Paired t-test, Concordance
Correlation Coefficient (CCC) and Intraclass Correlation Coefficient (ICC) were
used for data analysis. All p-values of paired t-tests for GC, cadence, step
length and velocity were greater than 0.05 while all CCC and ICC results were
above 0.95. The measurements of GC, cadence, step length, velocity and step
counts by motion analysis system are highly consistent with the measurements by
GoPro Hero3. The measurements of former parameters by GoPro Hero3 are not
statistically different from the measurements by IDEEA3. IDEEA3 can be
effectively used for the measurement of GC, cadence, step length, velocity and
step counts in KOA patients. The KOA patients walk with longer GC, lower cadence,
shorter step length and slower speed compared with healthy subjects in natural
speed with flat shoes.
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Langue : ANGLAIS