1. Smartphone-based real-life activity data for physical performance outcome in comparison to conventional subjective and objective outcome measures after degenerative lumbar spine surgery
- Author
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Stefanos Voglis, Michal Ziga, Anna M. Zeitlberger, Marketa Sosnova, Oliver Bozinov, Luca Regli, David Bellut, Astrid Weyerbrock, Martin N. Stienen, and Nicolai Maldaner
- Subjects
Smartphone-based accelerometer ,Objective functional assessment ,Functional performance ,Functional capacity ,Big data ,6-Min walking test ,Neurology. Diseases of the nervous system ,RC346-429 - Abstract
Introduction: Outcome assessments after surgery for degenerative lumbar disorders (DLDs) rely on subjective patient-reported outcomes (PROMs). New objective functional capacity tests, like the smartphone-based 6-min walking test (6WT), have been introduced but presumably also do not reflect the patient's real-life functional performance. Research question: Pilot study to analyze changes in smartphone-based real-life activity data for physical performance outcome in patients undergoing surgery for DLD. Material and methods: Prospective observational study of DLD patients. Objective functional capacity and subjective outcomes were measured using 6WT and PROMs. Real-life physical performance data were acquired retrospectively using Apple iPhone Health data and compared against objective capacity and subjective outcomes. Results: Eight patients (mean 46 years, 62% male) provided 286.858 smartphone mile counts. PROMs and physical capacity (6WT) significantly improved postoperatively. 6WT results increased from 352m pre-to 555/567m at 6/12 weeks postoperatively (p = 0.03). For physical performance a linear mixed effect models showed an increase in daily distance in the first 4 months after surgery (slope +0.178; p
- Published
- 2022
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