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Neurological Rehabilitation

Session: Prosthetic Mobility Curves: Lifetime Mobility Values by Amputation Level & Etiology, Age and Sex

Prosthetic Mobility Curves: Lifetime Mobility Values by Amputation Level and Etiology, Age and Sex

Friday, October 24, 2025
12:00 PM - 1:30 PM MT
Location: Kiosk 8

    Co-Author(s)

  • Phillip Stevens, Other

    VP, Clinical Affairs
    Hanger Institute for Clinical Research and Education
    Salt Lake City, Utah

    • Poster Presenter(s)

  • Bretta Fylstra, PhD

    Research Scientist
    Hanger Institute for Clinical Research and Education
    Austin, Texas

Disclosure(s):
Phillip Stevens, Other: No financial relationships to disclose
Bretta Fylstra, PhD: No financial relationships to disclose
Background and/or Objectives: Mobility changes throughout an individual’s life. Similar to pediatric growth charts as a staple of pediatric medicine, mobility curves can facilitate ready comparison of an individual's prosthetic mobility relative to their peers according to age, and amputation level and etiology. The present study builds upon previous work to further stratify mobility into single years of patient age. This allows clinicians to assess mobility changes over time against normative data in this population and establish informed mobility goals.

Design: A retrospective, cross-sectional analysis. The mean PLUS-M T-score was calculated for each age group and a cubic fit was applied to the mean data across age ranges. A 95% confidence interval was also calculated around the fitted line. A secondary analysis on knee type (micropressor vs. non-microproessor) was also conducted for individuals in the AKA group.

Setting : Data collected in private prosthetic clinics across the United States

Participants : Individuals were included if they were >18 years old, had a unilateral AKA or BKA, and either traumatic or dysvascular/diabetic etiology. Data were analyzed across 61 years of age (25-85). Individuals < 25 and >85 were grouped accordingly due to limited sampling at the extremes.

Interventions: Standardized measure of prosthetic mobility during routine prosthetic care

Main Outcome Measures: Prosthetic Mobility was assessed using the patient-reported PLUS-M.

Results: A total of 29,522 individuals (6,437 AKA & 23,085 BKA) met inclusion criteria and were included in the final sample. Trend models were built for AKA-Trauma, AKA-Dysvascular, BKA-Trauma, BKA-DV. Patients with MPK had on average, higher PLUS-M scores compared to nMPKs.

Conclusions: In general, mobility decreases with respect to age across amputation levels and etiologies. MPKs had increased mobility across all AKA age groups. These findings begin to demonstrate potential for modified goal setting based on matched peers in terms of age, amputation level, and etiology.