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Completed

NCT Number: NCT01914471

A Randomized Controlled Trial of Students for Nutrition and eXercise

Objectives: We conducted a randomized controlled trial (RCT) of Students for Nutrition and eXercise (SNaX), a middle-school-based obesity-prevention intervention combining school-wide environmental changes, multimedia, encouragement to eat healthy school cafeteria foods, and peer-led education and marketing.

Methods: We randomly selected schools from the Los Angeles Unified School District (LAUSD) and assigned five to the intervention group and five to a wait-list control group. School records were obtained for number of fruits and vegetables served, students served lunch, and snacks sold per attending student. Pre- and post-intervention surveys assessed psychosocial variables among 2,997 seventh-graders (75% of all seventh-graders across schools).

Hypotheses: For the RCT of SNaX, we hypothesized that SNaX would lead to increases in the proportion of students served in the cafeteria (because SNaX markets cafeterias' healthy foods); increased fruit and vegetable servings (because SNaX increases access to sliced/bite-sized fruits and vegetables); decreased school store snack sales; and greater water consumption. We also hypothesized that SNaX would lead to more positive attitudes about the cafeteria and water, improve obesity-prevention knowledge, and increase intentions to drink water.

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Key information

Conditions

Obesity Body Weight Nutrition Disorders Nutritional and Metabolic Diseases Overnutrition Overweight Pathological Conditions, Signs and Symptoms Signs and Symptoms

Age range

11 year and older

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

RAND Corporation

Santa Monica, California, 90401, United States

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • schools with >50% NSLP-eligible students (a proxy for low-income) and <900 - seventh-graders

Exclusion criteria

  • schools with <50% NSLP-eligible students and >900 seventh-graders

Treatment and study plan

Students for Nutrition and eXercise

Behavioral

These schools received the entirety of Students for Nutrition and eXercise, a middle-school-based obesity-prevention intervention combining school-wide environmental changes, multimedia, encouragement to eat healthy school cafeteria foods, and peer-led education and marketing

Primary outcomes

  1. Number of students obtaining lunch per day by National School Lunch Program (NSLP) eligibility

    Time frame: 5 months

    We obtained the number of students obtaining lunch per day (by National School Lunch Program (NSLP) eligibility) from schools.

  2. Number of fruits and vegetables served per day

    Time frame: 5 months

    We obtained the number of fruits and vegetables served per day from the school cafeterias.

Secondary outcomes

  1. Attitudes about the cafeteria

    Time frame: 5 months

    Attitudes about the cafeteria were calculated by survey data using the mean of two 7-point scales representing attitudes about the cafeteria: unsatisfying/satisfying and bad for my health/good for my health.

  2. Attitudes about water

    Time frame: 5 months

    Attitudes about water were measured with a survey including an 11-point scale (very negatively/very positively).

  3. Knowledge about healthy eating and physical activity

    Time frame: 5 months

    Knowledge about healthy eating and physical activity was measured with a survey containing 6 true/false items.

  4. Intentions to drink water

    Time frame: 5 months

    Intentions to drink water were assessed with two survey items, "How likely is it that you will drink water [or drink water from a refillable water bottle] the next day you are in school?" with 5-point scales (extremely likely/extremely unlikely).

  5. Water consumption frequency

    Time frame: 5 months

    Water consumption frequency was assessed by survey with, "How often do you usually drink tap water?" and "How often do you usually use a refillable water bottle to drink water?" (every day, a few times a week, once a week, twice a month, once a month, less than once a month, never).

  6. Number of snacks sold per day

    Time frame: 5 months

    We obtained the data on the number of snacks sold per day from the school store.

Sponsors and collaborators

Lead sponsor

Boston Children's Hospital

Other

Registry information

Official study title

A Community-Academic Partnership to Address Disparities in Obesity Among Youth

Acronym: SNaX

Important dates

Study start
2008
Primary completion
2012
Study completion
2013
First posted
Aug 2, 2013
Registry last updated
Aug 2, 2013

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

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This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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