Study on Web-Based Strategy to Reduce Children’s Salt Intake

Introduction to Salt Consumption Issues

A recent study evaluated the effectiveness of a web-based strategy aimed at reducing salt intake among children. In countries such as the United States, Australia, the United Kingdom, and Canada, school children are consuming excessive calories from highly processed foods, leading to an intake of salt that exceeds recommended limits. High salt consumption is linked to atherosclerosis, a condition characterized by the narrowing of blood vessels due to plaque buildup, which significantly contributes to cardiovascular diseases. This presents a growing concern for future healthcare systems in these nations.

The DELISH Strategy

The study, published in the Journal of Nutrition Education and Behavior, introduced a web-based initiative known as DELISH, which stands for Digital Education to Limit Salt In the Home. This program was designed to serve as an educational tool for both students and parents to lower salt intake among young Australians.

After obtaining approval for implementation in primary schools across Australia, the researchers secured consent from parents to introduce the program in the Greater Geelong Region of Victoria. The primary aim was to assess the efficacy of DELISH in reducing salt consumption. Researchers devised various methods to evaluate whether the program improved students’ knowledge, attitudes, and behaviors regarding their salt intake.

Study Design and Participants

Conducted over five weeks in five government schools, the study included 83 children aged seven to ten years, specifically those in grades two to four. Prior to the educational intervention, researchers measured the children’s height and weight. Participants were provided with urine collection bottles and instructed on how to use them throughout the day. This objective measure was crucial for determining whether the health education program effectively lowered sodium levels in the students’ urine output.

Engaging Parents through Children’s Learning

Children participated in an online detective game designed to be enjoyable while encouraging healthy habits, including reducing salt intake. They were also given a printed detective logbook to take home and discuss their learnings with their parents. This approach aimed to engage parents and potentially influence their food choices for the family.

While the program positively impacted family eating behaviors, researchers focused primarily on the children, educating them on how to evaluate food contents. They learned to read nutrition labels through the DELISH games.

Survey and Behavioral Assessment

After completing the activities, students filled out a 29-item online survey, which included 20 knowledge-based questions, two attitude-based questions, four behavior-based questions, and three self-efficacy questions. The behavior-related questions addressed what researchers termed “discretionary salt use,” such as adding salt to meals at the table and the presence of salt shakers during mealtime. Self-efficacy questions aimed to gauge whether children felt capable of altering their behaviors to reduce salt consumption.

Knowledge vs. Attitude Changes

The study’s findings were not as straightforward as anticipated. Among the 20 knowledge items assessed, students showed significant improvement in eight, particularly in recalling daily salt intake recommendations and the process of reading nutrition labels. However, increased knowledge did not translate into attitude changes. Researchers observed no significant difference in students’ perceptions of salt use before and after the DELISH program, as many still believed that salt enhances food flavor.

Self-Reported Behavioral Changes

Despite the knowledge-attitude gap, the study reported positive self-reported behavioral changes. Initially, 70% of students indicated they added salt to food at the table, while only 26% said they would do so if salt was not already provided. Students began discussing salt reduction with their parents, contributing to decreased availability of salt at home.

Biological Evidence and Program Impact

While the survey results were promising, the biological evidence revealed no significant change in participants’ sodium levels in urine following the five-week intervention. This outcome suggests that the DELISH program did not result in measurable changes in salt consumption among the students.

Community Impact and Future Implications

Although the lack of quantifiable evidence may suggest limited success, DELISH had a notable impact on the community. Students expressed enthusiasm for the program, with comments such as, “I loved to do it and it was interesting.” Another remarked, “It was interesting and fun. I will tell my friends all about this.”

Researchers noted that the participants were young and would need time to apply the knowledge they gained. With 70% of students recalling information from the program, DELISH has opened avenues for discussion about reducing salt intake among peers and families in the Greater Geelong Region, potentially fostering healthier habits in the long run.

Conclusion

The DELISH program highlights the importance of educational interventions in promoting health awareness among children. While immediate behavioral changes may not have been fully realized, the initiative has laid the groundwork for future discussions about salt intake and its health implications.

Reference

Grimes CA, Booth A, Khokhar D, West M, Margerison C, Campbell KJ, Nowson CA. Digital education to limit salt in the home (DELISH) program improves knowledge, self-efficacy, and behaviors among children. J Nutr Educ Behav. 2018;50:547-554. 2018 April 3.