How effective is virtual reality technology in palliative care? A systematic review and meta-analysis

Background: The efficacy of virtual reality for people living with a terminal illness is unclear. Aim: To determine the feasibility and effectiveness of virtual reality use within a palliative care setting. Design: Systematic review and meta-analysis. PROSPERO (CRD42021240395). Data sources: Medline, Embase, AMED, PsycINFO, CINAHL, Cochrane Central Register of Controlled Trials and Web of Science were searched from inception to March 2021. Search terms included ‘virtual reality’ and ‘palliative care’. Eligibility: (1) adult (>18 years old) with a terminal illness (2) at least one virtual reality session and (3) feasibility data and/or at least one patient outcome reported. The ROB-2 and ROBINS tools assessed risk of bias. The Grading of Recommendations, Assessment, Development and Evaluations (GRADE) tool assessed the quality of the evidence. Standardised mean differences (Hedges’s g) were calculated from the pre- and post-data. A DerSimonian-Laird random effects model meta-analysis was conducted. Results: Eight studies were included, of which five were in the meta-analysis. All studies had at least some concern for risk of bias. Virtual reality statistically significantly improved pain ( p = 0.0363), tiredness ( p = 0.0030), drowsiness ( p = 0.0051), shortness of breath ( p = 0.0284), depression ( p = 0.0091) and psychological well-being ( p = 0.0201). The quality of the evidence was graded as very low due to small sample sizes, non-randomisation methods and a lack of a comparator arm. Conclusions: Virtual reality in palliative care is feasible and acceptable. However, limited sample sizes and very low-quality studies mean that the efficacy of virtual reality needs further research.