Department of Community Health Sciences, School of Public Health, University of California Los Angeles, USA.
J Sch Health. 2011 Sep;81(9):520-9. doi: 10.1111/j.1746-1561.2011.00622.x.
Obesity among US children has increased in recent years. Although increased fruit and vegetable consumption has not been directly linked to obesity prevalence, it has been posited that more fruits and vegetables (FV) could reduce the consumption of high-fat, energy-dense foods and may protect against childhood illnesses including asthma and other respiratory diseases. The purpose of this current research was to assess the impact of a large public school district's hybrid approach to nutrition education programming on attitudes, beliefs, and behaviors related to fruit and vegetable consumption.
A total of 12 elementary schools from the Los Angeles Unified School District (9 intervention schools, 3 control schools) were randomly selected to participate in a "hybrid" school-based nutrition education program. Data were collected at baseline (beginning of school year) and postintervention data (end of school year 9 months later). Linear mixed models were developed to assess the impact of the intervention.
The intervention resulted in a significant change in teacher influence on students' attitudes toward FV (p < .05) and students' attitudes toward vegetables (p < .01), even after adjusting for gender, grade, and race/ethnicity. Although not statistically significant, there was a slight increase in fruit and vegetable consumption from pretest to posttest for both the intervention and control schools.
The hybrid model reflects a more accurate representation of school-based interventions. More research is needed to identify the specific components of this model that are most successful in impacting fruit and vegetable consumption among US children.
近年来,美国儿童的肥胖率有所上升。尽管增加水果和蔬菜的摄入量与肥胖症的流行并没有直接联系,但有人提出,多吃水果和蔬菜可以减少高脂肪、高能量食物的摄入,并且可能有助于预防儿童时期的疾病,包括哮喘和其他呼吸道疾病。本研究旨在评估洛杉矶联合学区(Los Angeles Unified School District)综合营养教育计划对与水果和蔬菜消费相关的态度、信念和行为的影响。
从洛杉矶联合学区(Los Angeles Unified School District)随机选择了 12 所小学(9 所干预学校,3 所对照学校)参与“混合”学校营养教育计划。在基线(学年开始时)和干预后数据(9 个月后的学年结束时)收集数据。采用线性混合模型评估干预的效果。
干预措施显著改变了教师对学生对水果和蔬菜态度的影响(p<.05)和学生对蔬菜态度的影响(p<.01),即使在考虑了性别、年级和种族/民族因素后也是如此。尽管没有统计学意义,但干预组和对照组的学生水果和蔬菜的摄入量都从前测到后测略有增加。
混合模式更准确地反映了基于学校的干预措施。需要进一步研究以确定该模式中最成功的具体成分,以影响美国儿童的水果和蔬菜摄入量。