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This abstract contains content that is significantly similar to the authors' previously published abstract in the Journal of Patient-Reported Outcomes. For access to the original publication, please visit the following URL: https://jpro.springeropen.com/articles/10.1186/s41687-024-00684-1

Outcome measurement in lumbar surgery is traditionally performed using patient questionnaires which may be limited by subjectivity. Objective gait analysis may supplement patient assessment but must be clinically viable. We assessed gait metrics in lumbar spine patients pre- and postoperatively using a small and lightweight wearable sensor.

•The proposed GSi algorithm aims to objectively evaluate the walking impairment associated with lumbar disc herniation (LDH).•GSi is calculated as deviation from mean (age-matched) normative values for gait velocity, step time asymmetry and step length asymmetry.•Clinical performance was assessed in a prospective, single surgeon series of 33 lumbar disc herniation (LDH) patients.•GSi was lower in LDH participants with significant distribution between surgical and conservative management subgroups.