External validation of a machine learning-based web application for personalized testing of objective functioning using the five-repetition sit-to-stand test - Report - MDSpire
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Validation of a Machine Learning-Driven Web Tool for Customized Assessment of Objective Functioning via the Five-Repetition Sit-to-Stand Test

  • By

  • Kenneth Arockia

  • Massimo Bottini

  • Anita M. Klukowska

  • Victor Gabriel El-Hajj

  • Maria Gharios

  • Ali Buwaider

  • Carlo Serra

  • Luca Regli

  • Marc L. Schröder

  • Victor E. Staartjes

  • August 18, 2026

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Clinical Report: Validation of a Machine Learning-Driven Web Tool for Customized Assessment

Overview

This study validates a machine learning-based web application designed to assess objective functioning via the five-repetition sit-to-stand (5R-STS) test. The model incorporates demographic variables to improve classification accuracy of objective functional impairment in a healthy cohort.

Background

Standardized outcome metrics are crucial in neurosurgical practice for assessing clinical status and treatment effects. The five-repetition sit-to-stand (5R-STS) test is a widely used diagnostic tool, but its reliance on a single upper limit of normal can lead to misclassification of patients. This study addresses the need for a more personalized approach to improve the accuracy of functional assessments.

Data Highlights

No numerical data provided in the source material.

Key Findings

  • The machine learning model improves classification accuracy of objective functional impairment (OFI) by incorporating demographic variables.
  • External validation was conducted on a cohort of healthy individuals from multiple countries.
  • The study emphasizes the importance of external validation for predictive models in clinical settings.
  • Standardized testing protocols were followed for the 5R-STS test to ensure consistency.
  • The model's generalizability across diverse demographics and testing conditions remains to be established.

Clinical Implications

The findings suggest that integrating demographic factors into functional assessments may enhance the accuracy of identifying objective functional impairment. This approach could lead to more tailored evaluations in clinical practice.

Conclusion

The validation of the machine learning-driven web tool requires further research to confirm its applicability across varied patient populations.

Related Resources & Content

  1. Author(s)/Org, Source, Year -- Title
  2. Factors Influencing Performance on the Five-Repetition Sit-to-Stand Test in Individuals with Lumbar Degenerative Disorders, Springer, 2022 -- Title
  3. Validation of a Motion Capture System for Assessing Surgical Skills in Laparoscopic Simulation Training Settings, Springer, 2025 -- Title
  4. A Core Set of Outcome Measures to Assess Physical Function for Adults Participating in Physical Therapist Treatment in the Hospital: A Clinical Practice Guideline - PMC, 2025 -- Title
  5. npj Digital Medicine — Innovative Remote Evaluation of Motor and Cognitive Functions in Parkinson's Disease: Utilizing Large Datasets, Machine Learning, and Telehealth Solutions
  6. Quality ID #471: Functional Status After Lumbar Surgery
  7. Reference values for the five-times-sit-to-stand test: a pooled analysis including 45,470 participants from 14 countries - PMC
  8. A Core Set of Outcome Measures to Assess Physical Function for Adults Participating in Physical Therapist Treatment in the Hospital: A Clinical Practice Guideline - PMC
  9. PowerPoint Presentation
  10. Reference values for gait speed, five-times-sit-to-stand test, balance, and handgrip strength: analysis of data from the English Longitudinal Study of Ageing | GeroScience | Springer Nature Link
  11. Asian Reference Values for Handgrip Strength, Gait Speed, Five‐Times‐Sit‐to‐Stand Test, Muscle Mass and Calf Circumference
  12. The Spine Journal 25 (2025) 696−718
  13. Measurement properties of the 5-repetition sit-to-stand test in patients with lumbar degenerative disorders: COSMIN systematic review - ScienceDirect

Original Source(s)

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