Development of an Annual Mobility Screen for Preclinical Mobility Limitation: Test Selection and Interpretation Guidelines

Authors

Michelle M. Lusardi, Department of Physical Therapy & Human Movement Science, College of Health Professions, Sacred Heart University, Fairfield, Connecticut, USA.
Victoria Hamby, School of Allied Health, College of Health Sciences, University of Louisiana Monroe, Monroe, Louisiana, USA.
Sterling Eckert, Department of Physical Therapy, Angelo State University, San Angelo, Texas, USA.
Jason Dring, Human Function, and Rehabilitation Sciences, School of Medicine and Health Science, George Washington University, Washington, District of Columbia, USA.

Document Type

Journal Article

Publication Date

5-10-2025

Journal

Journal of the American Geriatrics Society

DOI

10.1111/jgs.19521

Keywords

elderly; functional assessment; normative values; performance‐based assessment; physical therapy; preclinical mobility limitation

Abstract

BACKGROUND: Preclinical mobility limitation (PCML) is an emerging public health issue in the United States. A standardized assessment to identify those with PCML has not been established. A Task Force of the American Physical Therapy Association's Academy of Geriatric Physical Therapy (APTA Geriatrics) developed an evidence-based protocol for an Annual Mobility Screen (AMS) with the potential to meet this gap in practice. Early identification of PCML increases the potential for remediation, improved function, and a slower rate of decline. Because mobility is key for independence and quality of life, aging adults would value access to mobility screening. Physical therapists, experts in movement, are uniquely qualified to provide this service. METHODS: This report reviews decision-making for the selection of test/measures and the development of an interpretation rationale for an AMS. Test selection criteria included ratio level measures (time, distance, repetition), time or equipment requirements, ability to predict adverse health events, and availability of reference values. RESULTS: Four performance-based measures met inclusion criteria: self-selected and fast walking speed (overall mobility and functional reserve), 30 s Chair Stand (lower extremity muscle performance), Four Square Step test (dynamic balance stepping over low obstacles and changing direction), and Timed Up Go cognitive (ability to dual task while moving). Classification of mobility was based on normal distribution of performance across the population of aging adults as follows: PCML unlikely (at or above-0.5 SD or more from mean for age/gender), PCML likely (between -0.5 SD and - 1.0 SD from mean), and impending mobility limitation (-1 SD below the mean). CONCLUSION: The AMS was developed to identify older adults with PCML. The reliability and validity of the AMS and its interpretation strategies will be evaluated as the screening protocol is piloted.

APA Citation

Lusardi, Michelle M.; Hamby, Victoria; Eckert, Sterling; and Dring, Jason, "Development of an Annual Mobility Screen for Preclinical Mobility Limitation: Test Selection and Interpretation Guidelines" (2025). GW Authored Works. Paper 7274.
https://hsrc.himmelfarb.gwu.edu/gwhpubs/7274

Department

Health, Human Function, and Rehabilitation Sciences