Criterion validity of ActiGraph monitoring devices for step counting and distance measurement in adults and older adults: a systematic review

Background: Wearable activity monitors such as ActiGraph monitoring devices are widely used, especially in research settings. Various research studies have assessed the criterion validity of ActiGraph devices for step counting and distance estimation in adults and older adults. Although several studies have used the ActiGraph devices as a reference system for activity monitoring, there is no summarized evidence of the psychometric properties. The main objective of this systematic review was to summarize evidence related to the criterion validity of ActiGraph monitor‑ ing devices for step counting and distance estimation in adults and/or older adults. Methods: Literature searches were conducted in six databases (Medline (OVID), Embase, IEEExplore, CINAHL, Engi‑ neering Village and Web of Science). Two reviewers independently conducted selection, a quality analysis of articles (using COSMIN and MacDermid’s grids) and data extraction. Results: This review included 21 studies involving 637 participants (age 30.3±7.5 years (for adults) and 82.7±3.3 years (for older adults)). Five ActiGraph devices (7164, GT1M, wGTX+, GT3X+/wGT3X+and wGT3X − BT) were used to collect data at the hip, wrist and ankle to assess various walking and running speeds (ranging from 0.2 m/s to 4.44 m/s) over durations of 2 min to 3 days (13 h 30 mins per day) for step counting and distance esti‑ mation. The ActiGraph GT3X+/wGT3X+and wGT3X − BT had better criterion validity than the ActiGraph 7164, wGTX+and GT1M according to walking and running speeds for step counting. Validity of ActiGraph wGT3X+was good for distance estimation. Conclusion: The ActiGraph wGT3X − BT and GT3X+/wGT3X+have good criterion validity for step counting, under certain conditions related to walking speeds, positioning and data processing