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The aim of this study was to investigate, using a mixed-methods design, the added value of a trained Hospital Elder Life Program (HELP) volunteer to the quality of hospital care in the Netherlands. The trained volunteers daily stimulate older patients, at risk of a delirium, to eat, to drink, and to exercise, and they provide walking assistance and cognitive stimulation. This study showed that each group appreciated the extra attention and service from the volunteers. The positive effect on feelings of loneliness during the hospital stay was an unexpected outcome. The volunteers themselves appreciated their work. In conclusion, a HELP volunteer should be provided to every older hospital patient