The Effectiveness of a Virtual Reality-Based Intervention on Cognitive Functions in Older Adults with Mild Cognitive Impairment: A Single-Blind, Randomized Controlled Trial

Objective: Mild cognitive impairment (MCI) is a broad term for people at a stage between normal age-related cognitive decline and dementia, where cognitive problems are present but do not impair activities of daily living. This study aimed at evaluating the effectiveness of a virtual reality (VR)-based rehabilitation program on cognitive functions in MCI. Materials and Methods: Sixty-one older adults (25 men, 36 women) with MCI were randomized to the intervention group (n = 30; 70.12 +/- 2.57 years) or control (n = 31; 70.30 +/- 2.73 years) group. The intervention group received a VR (computer-generated interactive environments) intervention in addition to a conventional cognitive rehabilitation (CR) intervention, whereas the control group received only the CR intervention. Cognitive functions were assessed in both groups before and after the 12-week interventions by using the Loewenstein Occupational Therapy Cognitive Assessment-Geriatric. Results: Between-group comparisons revealed significantly greater improvements in orientation, visual-spatial perception, visuomotor organization, thinking operation, and attention/concentration functions in the VR group than in the control group (P < 0.001 for all). Conclusion: Our results showed that 12 weeks of VR-based rehabilitation enhanced cognitive functions in older adults with MCI. Using VR applications in CR is recommended to improve cognitive functions of older adults with MCI.