Summary of key features of prior studies of smartphone-mediated gait analysis.

Abbreviations: Accel.: conventional accelerometer; ΔM: mean inter-event interval; ΔSD: standard deviation of inter-event intervals; ΔCV: coefficient of variation of inter-event intervals; HE: healthy elderly; HY: healthy young; RA: rheumatoid arthritis; PD: Parkinson’s disease; SF: sampling frequency.a pilot data used to illustrate algorithms or processing steps in a proof-of-concept format;b obtained by dividing the pre-specified walking distance by the number of detected steps.Summary of key features of prior studies of smartphone-mediated gait analysis.