Effectiveness of Unhealthy Beverage Consumption Surveillance Program among Undergraduate Students at Sirindhorn College of Public Health Phitsanulok, within the Framework of the PBRI Model Concept

Abstract

The objectives of this quasi-experimental study using a three-group pretest-posttest design were 1) to create a between-group comparison of the mean pretest and posttest scores of health beliefs and unhealthy beverage consumption behaviors among a first experimental group, a second experimental group, and a control group, and 2) to generate a within-group comparison of the mean pretest and posttest scores of health beliefs and unhealthy beverage consumption behaviors within each group. The study was guided by the integration of the Health Belief Model and the PBRI Model Concept. The sample comprised 111 first-year undergraduate students at Sirindhorn College of Public Health Phitsanulok, divided equally into three groups of 37 students each. The participants were selected through simple random sampling with replacement. The research instruments consisted of 1) the Unhealthy Beverage Consumption Surveillance Program, 2) the “7-Color Warning Media,” and 3) a questionnaire on health beliefs and unhealthy beverage consumption behaviors, with content validity ranging from .60 to 1.00, and reliability coefficients of .98 for the health belief questionnaire and .87 for the consumption behavior questionnaire. Data were analyzed using descriptive statistics in percentage, mean, and standard deviation, as well as the Wilcoxon Signed-Rank Test, and the Kruskal–Wallis H Test. The findings indicated that 1) prior to the intervention, the first experimental group, the second experimental group, and the control group did not differ significantly in their levels of health beliefs and unhealthy beverage consumption behaviors. Following the intervention, the first experimental group demonstrated significantly higher scores in health beliefs and unhealthy beverage consumption behaviors than both the second experimental group and the control group at the .05 significance level. Moreover, the second experimental group exhibited significantly higher mean scores than the control group at the .05 level. When comparing within-group changes, 2) both experimental groups showed statistically significant increases in health beliefs and unhealthy beverage consumption behaviors from pretest to posttest at the .05 level, whereas the control group showed no statistically significant difference between the pretest and posttest measurements.