Prior meta-analyses have suggested that training utilizing virtual reality (VR) serves as a secure and effective intervention for elderly individuals experiencing mild cognitive impairment (MCI). Nevertheless, the effectiveness of such interventions appears to differ among various populations and cognitive domains. Furthermore, there remains a significant gap in understanding the effectiveness of VR-based training, specifically among individuals diagnosed with Alzheimer's disease (AD).

The researchers conducted a comprehensive search of databases, including Web of Science, PubMed, Cochrane Library, and EMBASE up until July 1, 2025, focusing on randomized controlled trials that investigated VR-based training in patients diagnosed with AD. The outcomes measured were categorized and analyzed separately, encompassing overall cognitive performance, distinct cognitive domains, psychosocial function, physical capabilities, and the execution of daily living activities within the context of AD trials.

Of the 265 publications identified, 11 (4.15%) randomized controlled trials (RCTs) eventually met all eligibility criteria. Those who received VR-based training showed significantly better global cognitive function [SMD (95%CI) = 0.44 (0.21–0.68)] and Short-term memory [SMD (95%CI) = 0.62 (0.25–0.99)] than the controls. However, no significant improvements were observed in areas such as executive function, spatial memory, activities of daily living, quality of life, balance and coordination, fear of falling, risk of falls, and depression levels.

VR-based interventions demonstrated beneficial effects on global cognitive function and short-term memory in AD populations. Due to the small sample size, the current research on evidence for efficacy in people with AD is weak and limited in many indicators.