Validating Accelerometers to Study Physical Activity of Toddlers
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|ClinicalTrials.gov Identifier: NCT01188044|
Recruitment Status : Completed
First Posted : August 25, 2010
Last Update Posted : January 6, 2011
|Condition or disease|
|Study Type :||Observational|
|Actual Enrollment :||56 participants|
|Official Title:||Validating the Use of Accelerometers for the Study of Physical Activity Among Young Malawian Toddlers|
|Study Start Date :||September 2010|
|Actual Primary Completion Date :||December 2010|
|Actual Study Completion Date :||December 2010|
- Feasibility/acceptability [ Time Frame: 7-day accelerometer measurement ]Proportion of participants (%) of wearing the accelerometer device for 4 days, 6 hours per day (defined from the accelerometer output data).
- Cut-off point values for sedentary, light, moderate, and vigorous activity [ Time Frame: First one-hour observation ]Videotaped observation of physical activity is classified by CPAF-method. Vector magnitude of the ActiGraph device attached to hip is compared to this gold standard and cut-off point values are determined by ROC curve analysis. Values are presented in counts/15 seconds. Sensitivity and specificity of the determined cut-point values in predicting the right activity class are also calculated.
- Sensitivity and specificity of the determined cut-off point values [ Time Frame: Second one-hour observation ]Activity count cut-off points derived from the first one-hour observation are cross-validated by determining their sensitivity and specificity in predicting the right activity class during the second one-hour observation.
- Intra- and inter-subject variation in time spent in different activity classes [ Time Frame: 7-day accelerometer measurement ]Intra-subject variation in time (%) spent in different activity classes between different days and inter-subject variation in time spent in different activity classes are determined.
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Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT01188044
|University of Malawi, College of Medicine|
|Principal Investigator:||Per Ashorn, MD, PhD||University of Tampere Medical School|
|Principal Investigator:||Kenneth Maleta, MBBS, PhD||University of Malawi College of Medicine|
|Principal Investigator:||Ashorn Ulla, PhD||University of Tampere Medical School|