Geriatric Nursing · Apr 3, 2026

Reliability and validity of the L test in people with Alzheimer's disease

By Ozkan T, Ates-Sari Y, Unluer NO et al.

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.

doi.org/10.1016/j.gerinurse.2026.104025 PubMed 41932058 Biomarkers