Nurse-supported Mobile App for Self-help CBT-I in Informal Cancer Caregivers

This mixed-methods randomized controlled trial investigates whether a nurse-supported mobile app for self-help cognitive behavioral therapy for insomnia (CBT-I) effectively reduces insomnia severity among informal cancer caregivers, compared to sleep hygiene education.\<br\>\<br\> The primary research question is:\<br\> Does nurse-supported mobile app for self-help CBT-I lower insomnia severity among cancer caregivers compared to sleep hygiene education at post-intervention and 3-month follow-up?\<br\>\<br\> A total of 208 participants will:\<br\> 1. Be randomly assigned to one of two groups:\<br\> (i) the nurse-supported mobile app-based self-help CBT-I group, which involves a 6-week CBT-I program delivered via a WeChat mini program along with weekly nurse support sessions (up to 20 minutes each); or\<br\> (ii) the sleep hygiene education group.\<br\> 2. Complete assessments at baseline, post-intervention, and 3-month follow-up to measure changes in insomnia severity (primary outcome). Secondary outcomes include subjective sleep outcomes, psychological well-being, caregiver burden, fatigue, health-related quality of life, and participants' acceptability and satisfaction.\<br\>\<br\> As recommended for trials of complex interventions, investigators will conduct a process evaluation in alignment with the Medical Research Council (MRC) guidance. The key functions of the process evaluation include: \*(1) implementation, (2) mechanisms of impact, and (3) context.\*