Systematic review of the current psychosocial interventions for people with moderate to severe dementia.

Aromatherapy and reminiscence therapy showed the strongest evidence in improving quality of life. There was some evidence that aerobic exercise enhanced cognition, and a multi-component study improved quality of life. However, a quality assessment, using pre-specified criteria, indicated many methodological weaknesses. While we found improvements in cognition and quality of life for moderate to severe dementia, results must be interpreted with caution. Future interventions with rigorous study designs are a pressing need and required before we can recommend specific interventions.