Literaturnachweis - Detailanzeige
| Autor/inn/en | Zhuang, Jie; Chen, Peijie; Wang, Chao; Jin, Jing; Zhu, Zheng; Zhang, Wenjie |
|---|---|
| Titel | Recovering Physical Activity Missing Data Measured by Accelerometers: A Comparison of Individual and Group-Centered Recovery Methods |
| Quelle | In: Research Quarterly for Exercise and Sport, 84 (2013), (8 Seiten)
PDF als Volltext |
| Sprache | englisch |
| Dokumenttyp | gedruckt; online; Zeitschriftenaufsatz |
| ISSN | 0270-1367 |
| DOI | 10.1080/02701367.2013.851060 |
| Schlagwörter | Foreign Countries; Physical Activities; Measurement Equipment; Data Analysis; Statistical Inference; Error of Measurement; Research Problems; Data Collection; Physical Activity Level; Simulation; Statistical Analysis; Preadolescents; Comparative Analysis; China |
| Abstract | Purpose: The purpose of this study was to determine which method, individual information-centered (IIC) or group information-centered (GIC), is more efficient in recovering missing physical activity (PA) data. Method: A total of 2,758 Chinese children and youth aged 9 to 17 years old (1,438 boys and 1,320 girls) wore ActiGraph GT3X/GT3X+ accelerometers for 7 consecutive days. Those with no missing data ("n" = 900) were used to form a nonmissing sample, which, based on a semisimulation approach, was used to create a missing data set to evaluate a set of recovery methods, including 2 IIC and 22 GIC methods. Root mean square difference (RMSD), mean signed difference, and paired "t" test were used to determine the effectiveness of the recovery methods. Results: The smallest RMSD values, which represent the most accurate recovery, were found with: (a) GIC-Expectation--maximization (GIC-EM) regardless of gender and by age (113,957.64); (b) GIC-EM regardless of gender and age (114,367.88); (c) GIC-EM regardless of age and by gender (114,697.06); (d) GIC-EM by gender and age (116,178.34); and (e) IIC averaging of remaining days (125,851.23). Conclusion: To recover 7-day PA accelerometer-determined activity missing data, we recommend using the GIC-EM and IIC approaches. (As Provided). |
| Anmerkungen | Routledge. Available from: Taylor & Francis, Ltd. 325 Chestnut Street Suite 800, Philadelphia, PA 19106. Tel: 800-354-1420; Fax: 215-625-2940; Web site: http://www.tandf.co.uk/journals |
| Erfasst von | ERIC (Education Resources Information Center), Washington, DC |
| Update | 2017/4/10 |
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