Review the detailed description of the study provided below….
Review the detailed description of the study provided below. Which of the following best describes the risk of bias in this study? Select the one correct answer. At the time of enrollment, parents provided written consent for both themselves and their children, while children provided written assent. Both the consent and assent forms described the two available programs (healthy weight management program vs. social-emotional learning program) but did not indicate which program served as the intervention or control condition. Parents were informed of which program their children would participate in one month prior to the first session, but the study condition (i.e., intervention or control) was not disclosed to them; however, the interventionists were aware of the program each group received. All study procedures and materials were approved by the University of Minnesota Institutional Review Board. The design and implementation of the intervention were informed by previous research and guided by a social-ecological framework. The healthy weight management intervention focused on weight-related behaviors and lifestyle practices intended to prevent excessive weight gain while minimizing potential harm. Three licensed school nurses, responsible for leading the intervention sessions, were aware that they are required to attend three mandatory one-hour training sessions before facilitating their first session. Intervention fidelity was assessed using a standardized procedure conducted by a staff member who did not deliver the intervention. Each group session was rated on a 0–10 scale, with 10 indicating full adherence to the intervention protocol. The average adherence score across all sessions and interventionists was 9.8 (SD = 0.1). Primary analyses followed an intention-to-treat approach and were conducted using a general linear mixed-effects model, adjusting for baseline body mass index z-score, age, sex, and pubertal status.