Jalinan Kasih android mobile phone application improves knowledge, attitude, and practice regarding early marriage among high school students: Evidence from quasi-experimental study.

Child marriage has a significant health impact on young mothers and their offspring. This study aims to compare the effectiveness of the Jalinan Kasih Android-based application, the Marriage Age Maturity (PUP) module, and the lecture method in improving knowledge, attitude, and practice regarding early marriage among high school students. A quasi-experiment with control groups was conducted, involving 72 students selected from three high schools in Bengkulu City, Indonesia who met the inclusion criteria. The participants were divided into three groups: 24 individuals in the application intervention group, 24 individuals in the module intervention group, and 24 individuals in the control group. The Jalinan Kasih application group showed an increase in average scores before and after the intervention, in terms of knowledge (6.46), attitude (6.79) and practice (1.75), with a p-value of 0.000, 0.000 and 0.17, respectively, The Jalinan Kasih application had a greater influence on knowledge, attitude and practice compared to the PUP module and the lecture method with a p-value of 0.000. In other words, the Jalinan Kasih mobile application was effective in improving the knowledge, attitude, and practice of high school students regarding early marriage through the use of its contents and consultation feature. It is recommended that the Jalinan Kasih application be used as an educational medium to prevent early marriage and improves family planning.