Can failure on adaptive locomotor tasks independently predict incident mobility disability?

Area of Science:

• Gerontology
• Mobility Research
• Preventive Medicine

Background:

• Mobility disability is a significant concern for older adults, impacting independence and quality of life.
• Early identification of individuals at risk for mobility decline is crucial for timely intervention.
• Adaptive locomotor tests may offer a sensitive measure of functional decline.

Purpose of the Study:

• To determine if the inability to perform specific adaptive locomotor tests predicts self-reported incident mobility disability in older adults.
• To investigate the predictive value of fast walking, narrow path walking, obstacle crossing, and talking while walking for future mobility limitations.

Main Methods:

• The study included 611 participants aged 50-85 years from the InCHIANTI study, free of mobility disability at baseline.
• Participants underwent assessments for four adaptive locomotor tests: fast walking, narrow path walking, obstacle crossing, and talking while walking.
• Mobility disability was reassessed at a 3-year follow-up.

Main Results:

• Failure in fast-walking and narrow-path walking tests significantly predicted incident mobility disability (odds ratio ≈ 2.5, P < 0.05).
• Failure in obstacle-crossing showed a trend towards predicting mobility disability (odds ratio ≈ 2, P = 0.077).
• Individuals failing both fast-walking and narrow-path tests had a nearly ninefold increased likelihood of reporting mobility disability.

Conclusions:

• Inability to perform adaptive locomotor tests, particularly fast walking and narrow path walking, is a significant predictor of future self-reported mobility disability in older adults.
• These simple tests can aid in identifying individuals at high risk for mobility decline.
• Targeted interventions for individuals failing these specific locomotor challenges may help prevent or delay mobility disability.