Effect of horticultural activities on quality of life, perceived stress, and working memory of community-dwelling older adults.

This study sampled 86 community-dwelling older adults to investigate the effect of horticultural activities on their quality of life, perceived stress, and working memory. The results demonstrated that after 8 weeks of horticultural activities, the effect sizes (Cohen's d) of their quality of life, perceived stress, and working memory were 0.92, -1.32, and 0.62, respectively. Among the four domains of quality of life, the social relationships domain improved the most. For perceived stress, the score of the experimental group decreased from 1.70 (0.48) to 1.29 (0.58). For working memory, the score increased from 3.43 (1.13) to 4.14 (1.27), whereas the score of the control group did not change substantially. Statistical analysis conducted using a generalized estimating equation revealed a significant interaction effect between group and time (P < 0.001). This study provides a reference for improving the quality of life, perceived stress, and working memory in older people.