Validity of a practitioner-administered observational tool to measure physical activity, nutrition, and screen time in school-age programs

International Journal of Behavioral Nutrition and Physical Activity

Steven L Gortmaker²  Madeleine E deBlois²  Catherine M Giles²  Angie L Cradock²  Erica L Kenney²  Jessica L Barrett²  Cassandra A Okechukwu²  Karen M Emmons¹  Rebekka M Lee² 

[1] Kaiser Foundation Research Institute, Oakland, California;Harvard School of Public Health, Social and Behavioral Sciences, 677 Huntington Avenue, Boston 02115, MA, USA

关键词: Measurement;    Validation;    Out-of-school time;    Afterschool;    Screen time;    Children;    Physical activity;    Nutrition;   

Others  :  1136127
DOI  :  10.1186/s12966-014-0145-5

 received in 2014-07-03, accepted in 2014-11-10,  发布年份 2014

【 摘 要 】

Background

Nutrition and physical activity interventions have been effective in creating environmental changes in afterschool programs. However, accurate assessment can be time-consuming and expensive as initiatives are scaled up for optimal population impact. This study aims to determine the criterion validity of a simple, low-cost, practitioner-administered observational measure of afterschool physical activity, nutrition, and screen time practices and child behaviors.

Methods

Directors from 35 programs in three cities completed the Out-of-School Nutrition and Physical Activity Observational Practice Assessment Tool (OSNAP-OPAT) on five days. Trained observers recorded snacks served and obtained accelerometer data each day during the same week. Observations of physical activity participation and snack consumption were conducted on two days. Correlations were calculated to validate weekly average estimates from OSNAP-OPAT compared to criterion measures. Weekly criterion averages are based on 175 meals served, snack consumption of 528 children, and physical activity levels of 356 children.

Results

OSNAP-OPAT validly assessed serving water (r = 0.73), fruits and vegetables (r = 0.84), juice >4oz (r = 0.56), and grains (r = 0.60) at snack; sugary drinks (r = 0.70) and foods (r = 0.68) from outside the program; and children’s water consumption (r = 0.56) (all p <0.05). Reports of physical activity time offered were correlated with accelerometer estimates (minutes of moderate and vigorous physical activity r = 0.59, p = 0.02; vigorous physical activity r = 0.63, p = 0.01). The reported proportion of children participating in moderate and vigorous physical activity was correlated with observations (r = 0.48, p = 0.03), as were reports of computer (r = 0.85) and TV/movie (r = 0.68) time compared to direct observations (both p < 0.01).

Conclusions

OSNAP-OPAT can assist researchers and practitioners in validly assessing nutrition and physical activity environments and behaviors in afterschool settings.

Trial registration

Phase 1 of this measure validation was conducted during a study registered at clinicaltrials.gov NCT01396473 webcite.

【 授权许可】

   
2014 Lee et al.; licensee BioMed Central Ltd.

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