Quality control
(1) A multicentre research team was established with sufficient personnel and reasonable hierarchy to ensure smooth project implementation. ICU nurse managers served as sub-centre leaders, while overall execution in each sub-centre was handled by head educators or quality control nurses from the respective departments. The intervention in this study was carried out by trained nurses who had substantial critical care or rehabilitation experience working in ICU settings. The eligibility criteria for intervention implementers and assessors in the sub-centres included: having a minimum of an associate degree, possessing over 10 years of ICU experience as nurses or rehabilitation therapists, demonstrating strong organisational and communication skills, and voluntary participation.(2) Based on a preliminary feasibility study, a standardised research manual and action videos were created and uploaded to an online platform for the research team's reference. These nurses underwent a comprehensive one-month training programme facilitated by a multidisciplinary team. The training team included experienced research nurses as well as a physician specialised in rehabilitative medicine. The purpose of the training was to equip the nurses with the necessary knowledge and skills to effectively implement the study programme in the ICU environment. They were trained on the specific intervention techniques and protocols outlined in the study.(3) To ensure the fidelity of the intervention, regular meetings were held with the intervention team. These meetings included quality control activities, such as reviewing intervention logs. The purpose of these reviews was to assess the competence of the interventionists in delivering the study programme and to address any questions or concerns that arose during the study period.Overall, the training and quality control activities were essential in ensuring that the intervention was implemented consistently and accurately throughout the study.