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Assessing physical activity in children with asthma: convergent validity between accelerometer and electronic diary
Josh N Floro1, Genevieve E Dunton, Ralph J Delfino
1Department of Psychology and Social Behavior, University of California-Irvine, CA 92612, USA.
Research Quarterly for Exercise and Sport
|August 5, 2009
Summary
Physical activity data from accelerometers and electronic diaries (ADA) showed moderate validity in children with asthma. This supports using ADA for tracking major daily activity changes in pediatric asthma research.
Area of Science:
- Pediatric Health
- Exercise Physiology
- Biomedical Engineering
Background:
- Accurate physical activity measurement is crucial for understanding asthma management in children.
- Previous research has explored various methods for assessing physical activity in pediatric populations.
- The Ambulatory Diary Assessment (ADA) offers a method for self-reported physical activity tracking.
Purpose of the Study:
- To evaluate the convergent validity of accelerometer data and electronic diary (ADA) physical activity reports in children with asthma.
- To determine the reliability of ADA in distinguishing between different physical activity intensities.
Main Methods:
- Sixty-two children (ages 9-18) with asthma participated in the study.
- Participants wore accelerometers and simultaneously used the ADA to log physical activity in 15-minute intervals every 2 hours.
- Statistical analysis, including Spearman correlation and mixed-effects models, was used to compare data.
Main Results:
- Moderate convergent validity was observed between accelerometer and ADA physical activity data (average Spearman r = .48).
- Accelerometer data showed significant differences between sleep, rest, and light activity as reported by ADA (p < .0001).
- No significant difference was found between moderate and strenuous activity levels (p = .70).
Conclusions:
- The moderate validity of ADA compared to accelerometers supports its use for assessing gross changes in daily physical activity in children with asthma.
- ADA can be a useful tool for short-term recall of physical activity patterns in pediatric asthma research.
- Further research may explore refining ADA for more granular activity intensity differentiation.
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