Lessons learned from a collaborative field-based collection of physical activity data using accelerometers

Evaluation of a comprehensive school physical activity program: Be a Champion!

BACKGROUND

Comprehensive School Physical Activity Programs (CSPAPs) are widely supported to increase physical activity (PA) in schools, but little has been reported to inform a comprehensive evaluation effort. The purpose of this report is to describe a comprehensive evaluation and monitoring strategy for CSPAP implementation.

METHODS

The System for Observing Staff Promotion of Activity and Nutrition (SOSPAN), System for Observing Student Movement in Academic Routines and Transitions (SOSMART), and System for Observing Play and Leisure Activity (SOPLAY) were employed to record student and staff behaviors (2642 total scans). To assess policies, practices, and environments, a CSPAP Policies and Practices questionnaire was used, which included components of the School Health Index, the School PA Policy Assessment, the School Environment and Policies Survey, and the School Health Policies and Practices Study. Youth PA (minutes/day) was assessed using accelerometers.

RESULTS

Working with school sites to ascertain the number of opportunities that are provided for PA and the amount of PA students engage in is challenging but feasible. The use of systematic observation, accelerometers, and questionnaires can provide a comprehensive representation of policies, practices, and behaviors to aid in establishing targeted PA action items.

CONCLUSIONS

Developing an evaluation framework that was rigorous enough to assess the physical, social, and policy environment of a school in order to answer the overarching research questions of the study but flexible enough to be feasibly streamlined for utilization by a school implementation team proved to be challenging but possible.

Cost-effectiveness of Community-Based Minigrants to Increase Physical Activity in Youth

CONTEXT

American youth are insufficiently active, and minigrant programs have been developed to facilitate implementation of evidence-based interventions in communities. However, little is known about the cost-effectiveness of targeted minigrant programs for the implementation of physical activity (PA) promoting strategies for youth.

OBJECTIVE

To determine the cost-effectiveness of a minigrant program to increase PA among youth.

DESIGN

Twenty community grantees were pair-matched and randomized to receive funding at the beginning of year 1 (2010-2011) or year 2 (2011-2012) to implement interventions to increase PA in youth. Costs were calculated by examining financial reports provided by the granting organization and grantees.

SETTING

Twenty counties in North Carolina.

PARTICIPANTS

A random sample of approximately 800 fourth- to eighth-grade youth (per year) from the approximately 6100 youth served by the 20 community-based interventions.

MAIN OUTCOME MEASURE

Cost-effectiveness ratios (CERs) were calculated at the county and project levels to determine the cost per child-minute of moderate-to-vigorous PA (MVPA) increased by wave. Analyses were conducted utilizing cost data from 20 community grantees and accelerometer-derived PA from the participating youth.

RESULTS

Of the 20 participating counties, 18 counties displayed increased youth MVPA between at least 2 waves of observation. Of those 18 counties, the CER (US dollars/MVPA minutes per day) ranged from $0.02 to $1.86 (n = 13) in intervention year 1, $0.02 to $6.19 (n = 15) in intervention year 2, and $0.02 to $0.58 (n = 17) across both years.

CONCLUSION

If utilized to implement effectual behavior change strategies, minigrants can be a cost-effective means of increasing children's MVPA, with a low monetary cost per minute of MVPA.

Physical Activity-Related Policy and Environmental Strategies to Prevent Obesity in Rural Communities: A Systematic Review of the Literature, 2002-2013

INTRODUCTION

Health disparities exist between rural and urban residents; in particular, rural residents have higher rates of chronic diseases and obesity. Evidence supports the effectiveness of policy and environmental strategies to prevent obesity and promote health equity. In 2009, the Centers for Disease Control and Prevention recommended 24 policy and environmental strategies for use by local communities: the Common Community Measures for Obesity Prevention (COCOMO); 12 strategies focus on physical activity. This review was conducted to synthesize evidence on the implementation, relevance, and effectiveness of physical activity-related policy and environmental strategies for obesity prevention in rural communities.

METHODS

A literature search was conducted in PubMed, PsycINFO, Web of Science, CINHAL, and PAIS databases for articles published from 2002 through May 2013 that reported findings from physical activity-related policy or environmental interventions conducted in the United States or Canada. Each article was extracted independently by 2 researchers.

RESULTS

Of 2,002 articles, 30 articles representing 26 distinct studies met inclusion criteria. Schools were the most common setting (n = 18 studies). COCOMO strategies were applied in rural communities in 22 studies; the 2 most common COCOMO strategies were "enhance infrastructure supporting walking" (n = 11) and "increase opportunities for extracurricular physical activity" (n = 9). Most studies (n = 21) applied at least one of 8 non-COCOMO strategies; the most common was increasing physical activity opportunities at school outside of physical education (n = 8). Only 14 studies measured or reported physical activity outcomes (10 studies solely used self-report); 10 reported positive changes.

CONCLUSION

Seven of the 12 COCOMO physical activity-related strategies were successfully implemented in 2 or more studies, suggesting that these 7 strategies are relevant in rural communities and the other 5 might be less applicable in rural communities. Further research using robust study designs and measurement is needed to better ascertain implementation success and effectiveness of COCOMO and non-COCOMO strategies in rural communities.

Obtaining Accelerometer Data in a National Cohort of Black and White Adults

PURPOSE

The objective of this study is to report methodological details and feasibility of conducting an accelerometer ancillary study in a large US cohort being followed for stroke and cognitive decline.

METHODS

Reasons for Geographic and Racial Differences in Stroke is a national population-based study of 30,239 blacks and whites, age ≥45 yr, enrolled January 2003 to October 2007. Baseline evaluations were conducted through computer-assisted telephone interview and an in-home visit. Participants are followed by computer-assisted telephone interview every 6 months. Starting with May 2009 follow-up, contingent on accelerometer availability, participants were invited to wear an accelerometer for 7 d. Device inventory was 1150. Accelerometer, instructions, log sheet, and stamped addressed return envelope were mailed to consenting participants. Postcard acknowledgement and reminders and two calls or less were made to encourage compliance.

RESULTS

Between May 2009 and January 2013, 20,076 were invited to participate; 12,146 (60.5%) consented. Participation rates by race-sex groups were similar: black women, 58.6%; black men, 59.6%; white women, 62.3%; and white men, 60.5%. The mean age of the 12,146 participants to whom devices were shipped was 63.5 ± 8.7 yr. Return rate was 92%. Of 11,174 returned, 1187 were not worn and 14 had device malfunction, and of 9973 with data, 8096 (81.2%) provided usable data, defined as ≥4 d of 10+ h of wear time, ranging from 74.4% among black women to 85.2% among white men.

CONCLUSIONS

Using mail and telephone methods, it is feasible to obtain objective measures of physical activity from a sizeable proportion of a national cohort of adults, with similar participation rates among blacks and whites. Linked with the clinical health information collected through follow-up, these data will allow future analyses on the association between objectively measured sedentary time, physical activity, and health outcomes.

Sex moderates associations between perceptions of the physical and social environments and physical activity in youth

PURPOSE

To determine if the sex of the child moderates the relationships between perceptions of the physical/social environments and moderate to vigorous physical activity (MVPA) in youth.

DESIGN

Cross-sectional.

SETTING

North Carolina.

SUBJECTS

A final sample of 711 children, 8 to 17 years of age, was available for analysis.

MEASURES

Self-reported presence of environmental factors previously identified to be associated with physical activity in youth was collected via survey. Daily MVPA was assessed via accelerometry for a minimum of 4 days.

ANALYSIS

Multilevel linear regression models were employed, adjusted for clustering at the county and individual level. MVPA was first regressed onto sex and environmental perception items while controlling for grade and race. The interaction term between sex and environmental perception was then added to the model.

RESULTS

A significant positive association was observed in the first models between MVPA and two items related to parent permission to (1) walk and (2) ride a bike in the neighborhood. These effects were fully moderated by sex, with males indicating "yes" on these items exhibiting 6.87 and 5.21 more minutes of MVPA (respectively) than males indicating "no."

CONCLUSION

Environmental perceptions appear to be related to MVPA, but this relationship is present only in males. Future research should be conducted to identify modifiable social and physical characteristics that are associated with MVPA in females.