Article

OBJECTIVE: To assess the diagnostic accuracy of the surface electromyography
(sEMG) parameters associated with referred anterior knee pain in diagnosing
patellofemoral pain syndrome (PFPS). DESIGN: Sensitivity and specificity
analysis. SETTING: Physical rehabilitation center and laboratory of biomechanics
and motor control. PARTICIPANTS: Pain-free subjects (n=29) and participants with
PFPS (n=22) selected by convenience. INTERVENTIONS: Not applicable. MAIN OUTCOME
MEASURE: The diagnostic accuracy was calculated for sEMG parameters' reliability,
precision, and ability to differentiate participants with and without PFPS. The
selected sEMG parameter associated with anterior knee pain was considered as an
index test and was compared with the reference standard for the diagnosis of
PFPS. Intraclass correlation coefficient, SEM, independent t tests, sensitivity,
specificity, negative and positive likelihood ratios, and negative and positive
predictive values were used for the statistical analysis. RESULTS: The
medium-frequency band (B2) parameter was reliable (intraclass correlation
coefficient=.80-.90), precise (SEM=2.71-3.87 normalized unit), and able to
differentiate participants with and without PFPS (P<.05). The association of B2
with anterior knee pain showed positive diagnostic accuracy values (specificity,
.87; sensitivity, .70; negative likelihood ratio, .33; positive likelihood ratio,
5.63; negative predictive value, .72; and positive predictive value, .86).
CONCLUSIONS: The results provide evidence to support the use of EMG signals
(B2-frequency band of 45-96 Hz) of the vastus lateralis and vastus medialis
muscles with referred anterior knee pain in the diagnosis of PFPS.
CI - Copyright (c) 2014 American Congress of Rehabilitation Medicine. Published by
Elsevier Inc. All rights reserved.

Langue : ANGLAIS