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Accelerometry measured ethnic differences in activity in rural adolescents.

ABSTRACT: BACKGROUND:To determine if there are differences in time spent in physical activity and sedentary behavior between rural African American and Caucasian children. METHODS:Children wore accelerometers for 3 weekdays. The students were randomly selected from a larger sample of children participating in a weight gain prevention intervention. Usable data were obtained from 272 of the 310 students who agreed to participate. The outcome data included counts per minute (CPM), time spent in moderate to vigorous (MVPA), light (LPA), and sedentary (SED) activity. The equation and cutoff used to analyze national accelerometry data were used for the current study. RESULTS:The sample had an average age of 10.4 (1.1) years and 76% were African American. Lower SES African Americans had more CPM (P=.012) and spent more time in MVPA (P=.008) compared with middle SES African American and lower SES Caucasian children. Lower SES African American children also spent fewer minutes in SED activity (P=.044) compared with middle SES African American children. CONCLUSIONS:These findings support recent results that also used objective activity measures. Children appeared less active and more sedentary than a national sample, warranting interventions in minority and rural populations.

SUBMITTER: Newton RL

PROVIDER: S-EPMC3074436 | biostudies-literature | 2011 Feb

REPOSITORIES: biostudies-literature

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Accelerometry measured ethnic differences in activity in rural adolescents.

Newton Robert L RL Han Hongmei H Sothern Melinda M Martin Corby K CK Webber Larry S LS Williamson Donald A DA

Journal of physical activity & health 20110201 2

<h4>Background</h4>To determine if there are differences in time spent in physical activity and sedentary behavior between rural African American and Caucasian children.<h4>Methods</h4>Children wore accelerometers for 3 weekdays. The students were randomly selected from a larger sample of children participating in a weight gain prevention intervention. Usable data were obtained from 272 of the 310 students who agreed to participate. The outcome data included counts per minute (CPM), time spent i ...[more]

PMID: 21415456

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Project description:BACKGROUND:Functional capacity assessment is a core component of current perioperative cardiovascular evaluation and management guidelines for noncardiac surgery. The authors investigated the ability of standardized physical function questions to predict whether participants engaged in moderate physical activity as measured by hip accelerometers. METHODS:Participant responses to physical functioning questions and whether they engaged in moderate physical activity were extracted from the National Health and Nutrition Examination Survey (2003 to 2004 and 2005 to 2006). Physical activity intensity was measured using hip accelerometers. Adult participants with at least one Revised Cardiac Risk Index condition were included in the analysis. Standardized physical function questions were evaluated using a classification and regression tree analysis. Training and test datasets were randomly generated to create and test the analysis. RESULTS:Five hundred and twenty-two participants were asked the physical functioning questions and 378 of 522 (72.4%) had a bout of moderate-vigorous activity. Classification and regression tree analysis identified a "no difficulty" response to walking up 10 stairs and the ability to walk two to three blocks as the most sensitive questions to predict the presence of a 2-min bout of moderate activity. Participants with positive responses to both questions had a positive likelihood ratio of 3.7 and a posttest probability greater than 90% of a 2-min bout of moderate-vigorous activity. The sensitivity and specificity of positive responses to physical functioning questions in the pruned tree were 0.97 (95% CI, 0.94 to 0.98) and 0.16 (95% CI, 0.10 to 0.23) for training data, and 0.88 (95% CI, 0.75 to 0.96) and 0.10 (95% CI, 0.00 to 0.45) for the test data. Participants with at least one 2-min bout of moderate activity had a greater percentage of overall daily active time (35.4 ± 0.5 vs. 26.7 ± 1.2; P = 0.001) than those without. CONCLUSIONS:Standardized physical function questions are highly sensitive but poorly specific to identify patients who achieve moderate physical activity. Additional strategies to evaluate functional capacity should be considered.

Dataset Information

Accelerometry measured ethnic differences in activity in rural adolescents.

Publications

Accelerometry measured ethnic differences in activity in rural adolescents.

Similar Datasets

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