Martens Marloes K, Van Assema Patricia, Paulussen Theo Gwm, Van Breukelen Gerard, Brug Johannes
Nutrition and Toxicology Research Institute Maastricht (NUTRIM), Department of Health Education and Health Promotion, Maastricht University, PO Box 616, 6200 MD Maastricht, The Netherlands.
Public Health Nutr. 2008 Mar;11(3):271-8. doi: 10.1017/S1368980007000298. Epub 2007 Jul 3.
The aim of this study was to assess the behavioural effects of a school-based healthful diet promotion intervention implemented in lower vocational schools.
A cluster-randomised pre-test-post-test experimental design was used, and data were collected by means of written questionnaires.
Students of 18 Dutch lower vocational schools.
The final sample consisted of 10 experimental schools with 13 teachers, 37 classes and 879 students, and eight control schools with 10 teachers, 31 classes and 734 students (total n = 1613).
Fixed regression analyses revealed beneficial effects on the behavioural measures relating to fruit intake (as assessed by a food frequency measure and fruit consumption during the previous day), and most behavioural measures related to high-fat snack intake (food frequency measure, and number of snacks and total fat intake from snacks during the previous day). The behavioural effects relating to breakfast habits were limited. Some positive behavioural effects occurred in the total target population, others mainly or only among students with more unfavourable intakes at baseline. Mixed regression analysis found comparable regression coefficients for the behavioural outcomes, but the effects related to fruit intake were no longer statistically significant.
Although we did not find the expected effects on all outcome indicators, the total pattern of results suggest that Krachtvoer offered a surplus value over existing curricula. However, some programme elements need to be revised to improve effectiveness and prevent negative effects, and more information is needed about the long-term effects of the programme.
本研究旨在评估在中等职业学校实施的一项基于学校的健康饮食促进干预措施的行为效果。
采用整群随机前后测实验设计,并通过书面问卷收集数据。
18所荷兰中等职业学校的学生。
最终样本包括10所实验学校的13名教师、37个班级和879名学生,以及8所对照学校的10名教师、31个班级和734名学生(总计n = 1613)。
固定回归分析显示,该干预措施对与水果摄入量相关的行为指标(通过食物频率测量法以及前一天的水果消费量评估)以及大多数与高脂肪零食摄入量相关的行为指标(食物频率测量法、零食数量以及前一天零食中的总脂肪摄入量)产生了有益影响。与早餐习惯相关的行为影响有限。在整个目标人群中出现了一些积极的行为影响,其他影响主要或仅出现在基线摄入量较差的学生中。混合回归分析发现行为结果的回归系数具有可比性,但与水果摄入量相关的影响不再具有统计学意义。
尽管我们并未在所有结果指标上发现预期效果,但总体结果模式表明,与现有课程相比,Krachtvoer提供了额外价值。然而,需要对一些项目内容进行修订,以提高有效性并防止负面影响,并且还需要更多关于该项目长期影响的信息。