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Minimal Detectable Change for TUG and TUDS Tests for Children With Down Syndrome

Martin, Kathy PT, DHSc; Natarus, Michael DPT; Martin, Jeremy DPT; Henderson, Sarah DPT

doi: 10.1097/PEP.0000000000000333
Research Reports

Purpose: To determine test-retest reliability and minimal detectable change of the Timed Up and Go (TUG) and Timed Up and Down Stairs (TUDS) for Down syndrome.

Subjects: Twelve children with Down syndrome (DS) aged 3 to 17 years.

Methods: Two sessions, 1 week apart, with 3 trials of the TUG and 2 trials of the TUDS. Test-retest reliability was estimated using intraclass correlation coefficients and the standard error of measurement. The minimal detectable changes (MDCs) for both tests were calculated.

Results: The TUG and TUDS tests both had high test-retest reliability. The MDC was 1.26 seconds for the TUG and 12.52 seconds for the TUDS test.

Conclusions: Both tests were reliable in this population, but the MDC results suggest only the TUG is clinically useful.

The goal of this study was to determine the test-retest reliability and minimal detectable change of the Timed Up and Go and Timed Up and Down Stairs tests in children and adolescents with Down syndrome.

Krannert School of Physical Therapy, University of Indianapolis, Indiana.

Correspondence: Kathy Martin, PT, DHSc, Krannert School of Physical Therapy, University of Indianapolis, Indianapolis, IN 46227 (kmartin@uindy.edu).

The authors declare no conflicts of interest.

Copyright © 2017 Wolters Kluwer Health, Inc. and Section on Pediatrics of the American Physical Therapy Association. All rights reserved.