TY  - JOUR
PY  - 2014//
TI  - The intra-rater reliability and agreement of compensatory stepping thresholds of healthy subjects
JO  - Gait and posture
A1  - Crenshaw, Jeremy R.
A1  - Kaufman, Kenton R.
SP  - 810
EP  - 815
VL  - 39
IS  - 2
N2  - The purpose of this study was to evaluate the test-retest, intra-rater reliability and agreement of compensatory stepping thresholds. A protocol was developed to establish anteroposterior single-stepping thresholds, anteroposterior multiple-stepping thresholds, and lateral single-stepping thresholds. Healthy, young subjects stood on a microprocessor-controlled treadmill, and responded to three series of progressively challenging surface translations. Subjects were instructed to "try not to step" when establishing single-stepping thresholds or "try to take only one step" when establishing multiple-stepping thresholds. Stepping thresholds were defined as the minimum disturbance magnitude that consistently elicited a single or second compensatory step. Thresholds were expressed as the ankle torque necessary to maintain upright posture. Thresholds studied included anterior single-stepping thresholds (τ=273.0±82.3Nm), posterior single-stepping, thresholds (τ=235.5±98.0Nm), anterior multiple-stepping thresholds (τ=977.0±416.3Nm), posterior multiple-stepping thresholds (τ=701.9±237.5Nm), stability-side lateral single-stepping thresholds (τ=225.7±77.7Nm), and mobility-side lateral single-stepping thresholds (τ=236.8± 85.4Nm). Based on intraclass correlation coefficients (ICC) and Bland-Altman plots, all thresholds demonstrated excellent reliability (ICC(2,1)=0.87-0.97) and agreement. These results suggest that compensatory stepping thresholds have sufficient repeatability to be used in clinical and research-related assessments of fall-risk. Additional study is needed to determine the intra- and inter-rater reliabilities and validity of thresholds specific to the patient populations of interest.<p />  <p>Language: en</p>
LA  - en
SN  - 0966-6362
UR  - http://dx.doi.org/10.1016/j.gaitpost.2013.11.006
ID  - ref1
ER  -