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Long-term Activity Patterns in Individuals with Transfemoral Amputation

Retrospective analysis of 12 months of step activity data to quantify activity levels, variations, and patterns in 17 adults with unilateral transfemoral amputation. Results show seasonal and monthly activity variations. Warmer seasons and months promoted higher activity levels, but peak temperatures and humidity depressed activity. The study highlights the challenges in interpreting step activity data gathered over short time periods.

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Long-term Activity Patterns in Individuals with Transfemoral Amputation

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  1. Long-term activity in and among persons with transfemoral amputation Elizabeth G. Halsne, CPO, BSPO; Matthew G. Waddingham, CO, BSPO; Brian J. Hafner, PhD

  2. Aim • Retrospectively analyze 12 months of step activity data to quantify activity levels, variations, and patterns in 17 adults with unilateral transfemoral amputation (TFA). • Relevance • Although physical limitations associated with TFA have been studied in laboratory, little is known about habitual activity within free-living environments.

  3. Method • To characterize mobility: • Examined yearly, seasonal, and monthly average daily step counts and coefficients of variation (CoVs). • To explore relationships between clinical classification and performance: • Analyzed Medicare Functional Classification Level (MFCL).

  4. Results • Subjects averaged 1,540 prosthetic steps/day. • Activity generally increased with MFCL. • Relative variation (CoV): • Across subjects = 0.65. • Lower for those with higher activity levels. • No significant differences by group. • Marked seasonal and monthly patterns in activities.

  5. Conclusion • Warmer seasons and months generally promoted higher activity, but peak temperatures and humidity depressed activity. • Large variations within and between subjects may challenge the interpretation of step activity gathered over short time periods.

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