Table 1 Interview guide used in the focus group, with main topics, questions, and prompts

• SS symptoms

1. Based on your care experience, what SS symptoms do the residents have?

2. What are the common symptoms of SS?

• Person-centered dementia care: Individual dimension

1. How do you care for a resident when he or she shows problematic behavior due to SS?

2. What symptom of SS causes the most problem for you during the care process? Why?

• Person-centered dementia care: Multiple dimensions

1. How do you care for two or more residents when they show SS symptoms at the same time?

2. What kind of assistance do you expect when caring for older adults with SS?

3. How does the unit manage residents when they show problematic behavior due to SS?