Reliability and validity of the L test in people with Alzheimer's disease
Taskin Ozkan1, Yasemin Ates-Sari2, Nezehat Ozgul Unluer3
1Department of Therapy and Rehabilitation, Vocational School of Health Services, Giresun University, Giresun 28200, Turkey.
Objective:
To assess the test-retest reliability, minimum detectable change (MDC), and concurrent validity of the L test in people with Alzheimer's disease (PwAD).
Design:
A total of 37 PwAD participated in this study. To assess test-retest reliability, theL test was conducted twice at intervals of seven to ten days. The concurrent validity of the L test was evaluated using the TUG test, Elderly Mobility Scale, 2-Minute Walk Test (2-MWT), and 10-Meter Walk Test (10-MWT).
Results:
Excellent test-retest reliability was shown by the L test (ICC= 0.964). The MDC was found to be 5.77 s. There were moderate to strong associations between theL test and the other outcome indicators (correlation coefficients ranged from -0.410 to 0.763; p<0.05 for all).
Conclusion:
When it comes to evaluating functional mobility in PwAD, the L test shows excellent test-retest reliability. The L test was significantly related to TUG test, 10MWT, 2MWT, and Elderly Mobility Scale in PwAD. TheL test is a valid, reliable, practical, economical and valuable tool for assessing functional mobility in PwAD.
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