Multi-dimensional Analysis of Insomnia in Breast Cancer Patients and the Effectiveness of Virtual Reality Biofeedback-Assisted Mindfulness-Based Stress Reduction Therapy

INTERVENTION: Routine Intervention Group:Rehabilitation nursing was carried out according to the routine nursing methods of breast cancer patients, and oral sleep hygiene education was given to patients.;MBSR group:Mindfulness‐based stress reduction training is based on Kabat‐Zinn's original 8‐week mindfulness‐based stress reduction theory and is adapted to the patients own situation. Specific topics include: Mindfulness Meditation, Mindful Breathing, Mindful Standing Yoga, and Body Scanning. Patients are instructed to perform daily training sessions based on the provided mindfulness audio, 1 time a day for 30 minutes for 4 weeks.;VR‐BF+MBSR group:Use a mindfulness‐based stress reduction intervention assisted by VR biofeedback on top of the usual intervention. 1 time a day for 30 minutes for 4 weeks.;Retrospective group:None; CONDITION: Breast cancer PRIMARY OUTCOME: Pittsburgh Sleep Quality Index; SECONDARY OUTCOME: NRS?BFI‐C?PHQ‐9?GAD‐7?SSS‐CN?FACT‐B(V4.0);HRV?TST?N3?N1+N2?REM?Wake; INCLUSION CRITERIA: 1. Female patients aged >=18 years, histologically diagnosed with breast cancer according to the diagnostic criteria outlined in the "Chinese Anti‐Cancer Association Guidelines and Specifications for the Diagnosis and Treatment of Breast Cancer (2024 Edition)"; 2. Patients with no prior history of insomnia who were diagnosed with insomnia after breast cancer confirmation, in accordance with the "International Classification of Sleep Disorders, Third Edition (ICSD‐3)" and the "Chinese Guidelines for the Diagnosis and Treatment of Insomnia", with a Pittsburgh Sleep Quality Inde X(PSQI) score >7; 3.Patients and their families have provided informed consent for this study.