Reliability and validity of balance tests for community-dwelling older adults with musculoskeletal ambulation...

Physical performance-based tests are useful indices for identifying and managing fall risk in community-dwelling older adults. However, measurement errors in these tests have not been examined. This study aimed to clarify the reliability and validity of balance tests in community-dwelling older adults with musculoskeletal ambulation disability symptom complex.

This cross-sectional study used a test-retest design and included 52 participants from three medical facilities. The participants reported demographic and medical information using a questionnaire. Primary outcomes were the timed up-and-go test, five-times sit-to-stand test, one-leg standing test, and functional reach test results.

Significant correlations were found between each balance test and fear of falling and between the four balance tests. Each balance test demonstrated discriminant validity with intraclass correlation coefficients (1,1) ≥0.81. The minimal detectable change was 1.4 s, 1.6 s, 3.3 s, and 4.0 cm for the timed up-and-go test, five-time sit-to-stand test, one-leg standing test, and functional reach test, respectively.

Changes exceeding the minimal detectable change₉₅ in balance tests can be used to judge improvement or decline in physical function, which may inform clinical decision-making. The minimal detectable change₉₅ of balance tests should be used when implementing or modifying fall prevention programs.