Effectiveness of Virtual Reality-Based Interventions for Upper Limb Rehabilitation in Breast Cancer Patients: Systematic Review and Meta-Analysis.

To investigate the effectiveness of virtual reality (VR)-based interventions for functional rehabilitation of the upper limb in breast cancer patients through a systematic review and meta-analysis. The PubMed, Cochrane, Web of Science, CINAHL, Scopus, CNKI, Wanfang, and VIP databases were systematically searched for relevant literature published from the establishment of the database to June 2023. Differences in the effectiveness of VR-based interventions and other intervention therapies were compared using random effects model meta-analysis and standard deviation (SMD). Seven eligible articles were identified and included in the meta-analysis. The combined analysis found that VR-based interventions had a positive impact on patients' upper limb mobility in terms of flexion (SMD = 1.33, 95% confidence interval; CI [0.48-2.19],  = 0.002), abduction (SMD = 1.22, 95% CI [0.58-1.86],  = 0.0002), and external rotation (SMD = 0.94, 95% CI [0.48-1.40],  < 0.0001). In addition, VR-based interventions could significantly improve the postoperative pain of patients with breast cancer. However, in grip strength (SMD = 0.43, 95% CI [-3.05 to 3.92],  = 0.81), shoulder muscle strength in flexion strength (SMD = 0.05, 95% CI [-2.07 to 2.18],  = 0.96), abduction strength (SMD = -0.10, 95% CI [-1.32 to 1.12],  = 0.88), external rotation strength (SMD = 0.46, 95% CI [-1.96 to 2.88],  = 0.71), and lymphedema, VR was as effective as other intervention treatments. A subgroup analysis showed that patients younger than 55 years had more benefit with VR-based rehabilitation than with other interventions and showed improvements with the intervention within 2 weeks. The intervention effect of using auxiliary equipment such as robotic arms is better than VR exercise based solely on games. The results of meta-analysis show that the intervention measures based on VR have positive effects on the improvement of upper limb mobility and pain relief in breast cancer patients. However, considering the low quality of evidence and small sample size, more clinical studies should be conducted to improve the credibility of the results.