Effects of the Self-efficacy Program for Nutrition Management on Dietary Behaviors and Body Mass Index of Overweight Grade 11th Students.
Keywords:Self-efficacy program, Dietary behaviors, Body mass index, High school students, Overweight
The purpose of this quasi-experimental research was to study the effects of self-efficacy program for
nutrition management on dietary behaviors and body mass index (BMI) of overweight grade 11th students.
Sample groups were 60 overweight (BMI > 23 Kg/m2) grade 11th students of the 2020 academic year.
They were selected by purposive inclusion criteria and matched pairs to divide in experimental and control
group (30 persons per each group). The experimental group participated in the program for a period of
12 weeks. The control group received normal instruction. Self-efficacy program for nutrition management;
promoting the ability to lose weight through successful experiences, learning weight loss experience,
persuasion with words and pictures through online media and emotional management were intervened
to experimental group. Research colleting instruments were a dietary behavior questionnaire and body mass
index form. All instruments were passed quality checks for content validity and validity according to
benchmark. Data were analyzed by using frequency statistics, percentage, mean, standard deviation, paired
t-test and independent t-test.
The results found that: The mean score of dietary behaviors, the overweight students of experimental
group were significantly higher than before intervention and higher than the control group (p < .001). And the
mean score of body mass index, the overweight students of experimental group had significantly lower than
before intervention and had significantly lower than the control group (p < .001). These results presented
that self-efficacy program for nutrition management was effective to improve positive dietary behaviors and
reduce body mass index of overweight grade 11th students.
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