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Reliability and validity of the L test in people with Alzheimer's disease
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DOI：10.1016/j.gerinurse.2026.104025.png)
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Abstract
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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. (c) 2026 Elsevier Inc. All rights are reserved, including those for text and data mining, AI training, and similar technologies.
Keywords:
Alzheimer's disease
Validity
Reliability
L test
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