Development of Physiological Evaluation Method in Horticultural Therapy-Verifying Stress Reduction of Clients and Supporting Staff in Clinical Site

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The results of this study suggest that salivary chromogranin A is effective as a mental stress biomarker and VAS and STAI are effective as psychological indicators in evaluating the stress reduction effects in clinical horticultural therapy. The flower arrangement task had some characteristics such as using flowers with comfortable stimulation, being feasible with acquired and residual abilities. The study suggests that these features of horticultural therapy may reduce mental stress of the elderly with dementia biologically and physiologically and furthermore, lead to psychological stress reduction of the staff members attending the activities as supporters.