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Estimating power wheelchair electronics lifespan based on real-world data.

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Area of Science:

  • Biomedical Engineering
  • Rehabilitation Engineering
  • Medical Device Technology

Background:

  • Electronics are essential for power wheelchair (PWC) functionality and usability.
  • Current research lacks comprehensive data on PWC electronic component lifespan, hindering effective maintenance and funding strategies.

Purpose of the Study:

  • To investigate the lifespan of power wheelchair (PWC) electronics.
  • To estimate the time to electronic repair or replacement.
  • To identify factors influencing PWC electronic lifespan variability.

Main Methods:

  • Retrospective analysis of 1268 group 2 power wheelchairs (PWCs) from the Wheelchair Repair Registry.
  • Application of Kaplan-Meier survival analysis to estimate median survival time.
  • Utilized Cox proportional hazards models to identify predictors of reduced electronic survival.

Main Results:

  • 29.2% of PWCs experienced electronics-related repairs, with a median electronic survival of 32.2 months.
  • Group 3 device type (HR, 1.58; p = .003) and distribution years 2017 (HR, 1.82; p < .001) and 2018 (HR, 4.08; p < .001) were significant predictors of reduced survival.
  • Manufacturer D showed a marginally significant association with reduced electronics survival (HR, 1.66, p = .070).

Conclusions:

  • Findings highlight the critical role of maintenance and design in improving PWC reliability and user quality of life.
  • Emphasizes the need for further research with broader data to inform global PWC user support.