Mental health problems affect large numbers of young people. Integrated systems are required that can be applied in diverse settings to reach youth ‘where they are’. We evaluated the process of implementing a three-step youth mental health and wellbeing system in diverse community settings according to three implementation outcomes: feasibility, penetration and acceptability. The study describes 49 applications of the ‘Life-Fit-Learning system’ designed to assess the mental health and wellbeing of youth (Assess step), provide feedback on assessment results (Reflect step), and connect them to resources and services proportionate to their needs (Connect step). Within a participatory research approach, 3798 administrations were conducted with youth between 9 and 18 years and 90 administrations were conducted with adults. Implementation was based on the four phases of the Quality Implementation Framework and was staged to integrate stakeholder and consumer feedback and experience gained from focus groups and two pilot phases before full implementation. Feasibility ratings of successful implementation ranged from 86.7 to 96.4% across applications and settings. High penetration rates were achieved. The Life-Fit-Learning system successfully reached 91.9% to 96% of youth with the Assess and Reflect steps and low intensity Connect step resources. Of those, 14.7% to 23% were identified at-risk for mental health problems and 93% to 97% of those at-risk youth additionally received Connect step co-delivered group-based programs (moderate intensity care) and/or individual treatment (high intensity care). Youth and parents reported high satisfaction across all steps and delivery modes. With strong collaboration, an integrated model of care can be delivered feasibly, effectively and satisfactorily to reach large numbers of young people across settings.

心理健康问题影响着大量年轻人。需要可以在不同环境中应用的综合系统，以帮助青年“在他们所在的地方”。我们根据三个实施结果评估了在不同社区环境中实施三步青少年心理健康和福祉系统的过程：可行性、渗透性和可接受性。该研究描述了“Life-Fit-Learning 系统”的 49 种应用，旨在评估青少年的心理健康和福祉（评估步骤），提供对评估结果的反馈（反映步骤），并将他们与与其相称的资源和服务联系起来。需要（连接步骤）。在参与式研究方法中，对 9 至 18 岁的青少年进行了 3798 次给药，对成年人进行了 90 次给药。实施基于质量实施框架的四个阶段，分阶段整合利益相关者和消费者的反馈以及从焦点小组和两个试点阶段获得的经验，然后全面实施。跨应用程序和设置的成功实施的可行性评级从 86.7% 到 96.4% 不等。实现了高渗透率。Life-Fit-Learning 系统通过评估和反思步骤以及低强度连接步骤资源成功覆盖了 91.9% 至 96% 的青少年。其中，14.7% 至 23% 被确定有心理健康问题的风险，93% 至 97% 的有风险青年还接受了 Connect step 共同提供的基于小组的计划（中等强度护理）和/或个人治疗（高强度护理）。青少年和家长对所有步骤和交付方式都表示高度满意。通过强有力的合作，可以切实、有效和令人满意地提供综合护理模式，以覆盖不同环境中的大量年轻人。