{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/88218"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/88218","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Calibration of an accelerometer to measure physical activity in preschool children: A feasibility study","abstract":"Physical activity measurements are essential for the evaluation and prevention of childhood obesity. Although physical activity (PA) data are currently collected with accelerometry, using the existing accelerometers had limitation with cost efficiency issues. The Best Fit Friend (BFF), a new accelerometer PA monitor system, was develop to solve the cost issue; however, validity of BFF to measure the PA in preschool children is still not clear. The primary purpose of this thesis was to examine the feasibility of BFF accelerometer for measure 3 to 5 year-olds preschoolers’ PA measurement. Based on the parental response and participant’s feedback, research and device feasibility were estimated. The second purpose was to validate the BFF accelerometer though a comparison with ActiGraph. Pearson correlation showed a moderate-high and/or high correlation between BFF accelerometer and ActiGraph. The third purpose was to clarify the difference of attachment placement: wrist and waist. Wilcoxon signed ranks test was to examine the statistical difference between dominant hand and non-dominant hand (Z = 4.99, p < .000, d = -.481), whereas there was not statistical differ with left wrist and waist, back and waist (Z = -1.39, p < .165, d = .130; Z = -.529, p < .597, d = -.050). The fourth purpose was to calibrate the BFF accelerometer to establish cut-off points. ROC curve analysis was performed. The last purpose was to decide the best placement of BFF accelerometer for children’s PA measurement. Based on comparison between AUC and cut-off, waist and back placements was the best BFF location, and right wrist, waist, and back conduct the best cut-off points. Overall, the BFF is a valid device to measure PA in preschool children ranged from 3 to 5 years old.","abstract_html":"Physical activity measurements are essential for the evaluation and prevention of childhood obesity. Although physical activity (PA) data are currently collected with accelerometry, using the existing accelerometers had limitation with cost efficiency issues. The Best Fit Friend (BFF), a new accelerometer PA monitor system, was develop to solve the cost issue; however, validity of BFF to measure the PA in preschool children is still not clear. The primary purpose of this thesis was to examine the feasibility of BFF accelerometer for measure 3 to 5 year-olds preschoolers’ PA measurement. Based on the parental response and participant’s feedback, research and device feasibility were estimated. The second purpose was to validate the BFF accelerometer though a comparison with ActiGraph. Pearson correlation showed a moderate-high and/or high correlation between BFF accelerometer and ActiGraph. The third purpose was to clarify the difference of attachment placement: wrist and waist. Wilcoxon signed ranks test was to examine the statistical difference between dominant hand and non-dominant hand (Z = 4.99, p &lt; .000, d = -.481), whereas there was not statistical differ with left wrist and waist, back and waist (Z = -1.39, p &lt; .165, d = .130; Z = -.529, p &lt; .597, d = -.050). The fourth purpose was to calibrate the BFF accelerometer to establish cut-off points. ROC curve analysis was performed. The last purpose was to decide the best placement of BFF accelerometer for children’s PA measurement. Based on comparison between AUC and cut-off, waist and back placements was the best BFF location, and right wrist, waist, and back conduct the best cut-off points. Overall, the BFF is a valid device to measure PA in preschool children ranged from 3 to 5 years old.","abstract_has_math":false,"creators":["Shin, Jong Cheol"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"M.S.","degree_level":"Thesis","degree_discipline":"Kinesiology","degree_department":null,"school":null,"contributors":["Zhu, Weimo","McBride, Brent A."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2015,"date_issued":"2015-09-29T20:50:20Z","date_published":"2015-09-29T20:50:20Z","updated_at":"2026-07-22T22:26:31Z","subjects":["Accelerometer","Physical activity"],"languages":["en"],"rights":["Copyright 2015 JongCheol Shin"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/2142/88218","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Zhu, Weimo","McBride, Brent A."]},{"key":"dc:creator","label":"Author","values":["Shin, Jong Cheol"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2015-09-29T20:50:20Z","2017-09-30T09:15:32Z","2015-08","2015-07-20","2015-8"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Kinesiology"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Thesis"]},{"key":"thesis:degree_name","label":"Degree Name","values":["M.S."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Accelerometer","Physical activity"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2015 JongCheol Shin"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/88218"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Physical activity measurements are essential for the evaluation and prevention of childhood obesity. Although physical activity (PA) data are currently collected with accelerometry, using the existing accelerometers had limitation with cost efficiency issues. The Best Fit Friend (BFF), a new accelerometer PA monitor system, was develop to solve the cost issue; however, validity of BFF to measure the PA in preschool children is still not clear. The primary purpose of this thesis was to examine the feasibility of BFF accelerometer for measure 3 to 5 year-olds preschoolers’ PA measurement. Based on the parental response and participant’s feedback, research and device feasibility were estimated. The second purpose was to validate the BFF accelerometer though a comparison with ActiGraph. Pearson correlation showed a moderate-high and/or high correlation between BFF accelerometer and ActiGraph. The third purpose was to clarify the difference of attachment placement: wrist and waist. Wilcoxon signed ranks test was to examine the statistical difference between dominant hand and non-dominant hand (Z = 4.99, p < .000, d = -.481), whereas there was not statistical differ with left wrist and waist, back and waist (Z = -1.39, p < .165, d = .130; Z = -.529, p < .597, d = -.050). The fourth purpose was to calibrate the BFF accelerometer to establish cut-off points. ROC curve analysis was performed. The last purpose was to decide the best placement of BFF accelerometer for children’s PA measurement. Based on comparison between AUC and cut-off, waist and back placements was the best BFF location, and right wrist, waist, and back conduct the best cut-off points. Overall, the BFF is a valid device to measure PA in preschool children ranged from 3 to 5 years old.","Submission published under a 24 month embargo labeled 'U of I only', the embargo will last until 2017-08-01","The student, Jong Cheol Shin, accepted the attached license on 2015-07-20 at 09:06.","The student, Jong Cheol Shin, submitted this Thesis for approval on 2015-07-20 at 09:29.","This Thesis was approved for publication on 2015-07-20 at 13:27.","DSpace SAF Submission Ingestion Package generated from Vireo submission #8553 on 2015-09-29 at 15:00:51","Made available in DSpace on 2015-09-29T20:50:20Z (GMT). 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Although physical activity (PA) data are currently collected with accelerometry, using the existing accelerometers had limitation with cost efficiency issues. The Best Fit Friend (BFF), a new accelerometer PA monitor system, was develop to solve the cost issue; however, validity of BFF to measure the PA in preschool children is still not clear. The primary purpose of this thesis was to examine the feasibility of BFF accelerometer for measure 3 to 5 year-olds preschoolers’ PA measurement. Based on the parental response and participant’s feedback, research and device feasibility were estimated. The second purpose was to validate the BFF accelerometer though a comparison with ActiGraph. Pearson correlation showed a moderate-high and/or high correlation between BFF accelerometer and ActiGraph. The third purpose was to clarify the difference of attachment placement: wrist and waist. Wilcoxon signed ranks test was to examine the statistical difference between dominant hand and non-dominant hand (Z = 4.99, p < .000, d = -.481), whereas there was not statistical differ with left wrist and waist, back and waist (Z = -1.39, p < .165, d = .130; Z = -.529, p < .597, d = -.050). The fourth purpose was to calibrate the BFF accelerometer to establish cut-off points. ROC curve analysis was performed. The last purpose was to decide the best placement of BFF accelerometer for children’s PA measurement. Based on comparison between AUC and cut-off, waist and back placements was the best BFF location, and right wrist, waist, and back conduct the best cut-off points. Overall, the BFF is a valid device to measure PA in preschool children ranged from 3 to 5 years old.","Submission published under a 24 month embargo labeled 'U of I only', the embargo will last until 2017-08-01","The student, Jong Cheol Shin, accepted the attached license on 2015-07-20 at 09:06.","The student, Jong Cheol Shin, submitted this Thesis for approval on 2015-07-20 at 09:29.","This Thesis was approved for publication on 2015-07-20 at 13:27.","DSpace SAF Submission Ingestion Package generated from Vireo submission #8553 on 2015-09-29 at 15:00:51","Made available in DSpace on 2015-09-29T20:50:20Z (GMT). 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