Abstract
Objective
To examine the intertester reliability and validity of 5 nonradiologic measures of
forward flexed posture in individuals with Parkinson disease (PD).
Design
Cross-sectional observational study.
Setting
University outpatient facility and community centers.
Participants
Individuals (N=28) with PD with Hoehn and Yahr scores of 1 through 4.
Interventions
Not applicable.
Main Outcome Measures
Occiput to wall status, tragus to wall distance, C7 to wall distance, photographically
derived trunk flexion angle, and inclinometric kyphosis measure.
Results
Participants were older adults (mean, 69.7±10.6y) with a 14-month to 15-year (mean,
5.9±3.5y) history of PD. Intertester reliability was excellent for all measures (κ=.89
[cued condition] and 1.0 [relaxed condition] for occiput to wall status; intraclass
correlation coefficients, .779–.897 for tragus to wall distance, C7 to wall distance,
flexion angle, and inclinometric kyphosis measure). Convergent validity was supported
for all measures by significant correlations between the same measures obtained during
relaxed and cued conditions (eg, occiput to wall relaxed and cued) and for most measures
by significant correlations between measures obtained under the same condition (eg,
occiput to wall cued and tragus to wall cued). Significant correlations between tragus
to wall distance, C7 to wall distance, flexion angle, and inclinometric kyphosis measure
and the Unified Parkinson Disease Rating Scale item 28 (posture) also supported convergent
validity. Significant differences between tragus to wall distance, C7 to wall distance,
and inclinometric kyphosis measure values under relaxed and cued conditions supported
known condition validity. Known group validity was demonstrated by significant differences
in tragus to wall distance, C7 to wall distance, and inclinometric kyphosis measure
obtained from individuals able and individuals unable to touch their occiput to wall
when cued to stand tall.
Conclusions
Tragus to wall distance, C7 to wall distance, and inclinometric kyphosis measure are
reliable and valid nonradiologic measures of forward flexed posture in PD.
Keywords
List of abbreviations:
HY (Hoehn and Yahr), ICC (intraclass correlation coefficient), MDC95 (minimal detectable change based on 95% confidence interval), PD (Parkinson disease), PDQ-39 (Parkinson's Disease Questionnaire), UPDRS (Unified Parkinson Disease Rating Scale)To read this article in full you will need to make a payment
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Article info
Publication history
Published online: July 01, 2016
Footnotes
Disclosures: none.
Identification
Copyright
© 2016 by the American Congress of Rehabilitation Medicine
