2.4.5. Variables and measurement
This trial aimed to determine the effect of school-linked adolescents' friendly life skills intervention on improving SRH life skills. In the end-line survey, SRH life skills were compared between the intervention and control clusters. Moreover, factors that enhance life skills development were investigated. It is worth noting that SRH is of great importance. SRH life skills were identified as the outcome variable. High school sessions were taken as a clustering variable, and then, the independent variables were categorized as personal-level, behavioral-level, and environmental-level variables. Hence, four groups of life skill development with supposed cognitive mediators were used: information, self-awareness, critical thinking and self-esteem, and empathy. We analyzed and measured the cognitive variables influencing behavior changes in adolescents' life skills development. We used 27 items to measure appropriate SRH life skills in this study: agree/one had appropriate information, self-awareness, critical thinking and self-esteem, and empathy, and disagree/zero if not. The levels of SRH life skills were categorized using mean scores; thus, a life skills score above the mean is considered the appropriate SRH life skills (